diff --git a/doc/ca65.sgml b/doc/ca65.sgml
index 1e296d9c2..c34b14398 100644
--- a/doc/ca65.sgml
+++ b/doc/ca65.sgml
@@ -102,6 +102,7 @@ Short options:
   -mm model                     Set the memory model
   -o name                       Name the output file
   -s                            Enable smart mode
+  -S                            Generate segment offsets in listing
   -t sys                        Set the target system
   -v                            Increase verbosity
 
@@ -127,6 +128,7 @@ Long options:
   --no-utf8                     Disable use of UTF-8 in diagnostics
   --pagelength n                Set the page length for the listing
   --relax-checks                Relax some checks (see docs)
+  --segment-list                Generate segment offsets in listing
   --smart                       Enable smart mode
   --target sys                  Set the target system
   --verbose                     Increase verbosity
diff --git a/src/ca65/global.c b/src/ca65/global.c
index e8599a675..1398ce2c7 100644
--- a/src/ca65/global.c
+++ b/src/ca65/global.c
@@ -69,6 +69,7 @@ unsigned char RelaxChecks        = 0;   /* Relax a few assembler checks */
 unsigned char StringEscapes      = 0;   /* Allow C-style escapes in strings */
 unsigned char LongJsrJmpRts      = 0;   /* Allow JSR/JMP/RTS as alias for JSL/JML/RTL */
 unsigned char WarningsAsErrors   = 0;   /* Error if any warnings */
+unsigned char SegList            = 0;   /* Show segments in listing */
 unsigned char ExpandMacros       = 0;   /* Expand macros in listing */
 
 /* Emulation features */
diff --git a/src/ca65/global.h b/src/ca65/global.h
index 5ec4a8d82..1923bc748 100644
--- a/src/ca65/global.h
+++ b/src/ca65/global.h
@@ -71,6 +71,7 @@ extern unsigned char    RelaxChecks;        /* Relax a few assembler checks */
 extern unsigned char    StringEscapes;      /* Allow C-style escapes in strings */
 extern unsigned char    LongJsrJmpRts;      /* Allow JSR/JMP/RTS as alias for JSL/JML/RTL */
 extern unsigned char    WarningsAsErrors;   /* Error if any warnings */
+extern unsigned char    SegList;            /* Show segments in listing */
 extern unsigned char    ExpandMacros;       /* Expand macros in listing */
 
 /* Emulation features */
diff --git a/src/ca65/listing.c b/src/ca65/listing.c
index b3f3d9282..2c6b32f87 100644
--- a/src/ca65/listing.c
+++ b/src/ca65/listing.c
@@ -75,7 +75,6 @@ static unsigned ListBytes  = 12;        /* Number of bytes to list for one line
 static int      ListingEnabled = 1;     /* Enabled if > 0 */
 
 
-
 /*****************************************************************************/
 /*                                   Code                                    */
 /*****************************************************************************/
@@ -105,6 +104,7 @@ void NewListingLine (const StrBuf* Line, unsigned char File, unsigned char Depth
         L->Next         = 0;
         L->FragList     = 0;
         L->FragLast     = 0;
+        L->Seg          = ActiveSeg->Num;
         L->PC           = GetPC ();
         L->Reloc        = GetRelocMode ();
         L->File         = File;
@@ -181,6 +181,7 @@ void InitListingLine (void)
                 L = L->Next;
                 /* Set the values for this line */
                 CHECK (L != 0);
+                L->Seg           = ActiveSeg->Num;
                 L->PC            = GetPC ();
                 L->Reloc         = GetRelocMode ();
                 L->Output        = (ListingEnabled > 0);
@@ -191,6 +192,7 @@ void InitListingLine (void)
 
         /* Set the values for this line */
         CHECK (LineCur != 0);
+        LineCur->Seg        = ActiveSeg->Num;
         LineCur->PC         = GetPC ();
         LineCur->Reloc      = GetRelocMode ();
         LineCur->Output     = (ListingEnabled > 0);
@@ -276,7 +278,7 @@ static char* MakeLineHeader (char* H, const ListLine* L)
 {
     char Mode;
     char Depth;
-
+    unsigned Offset = 0;
     /* Setup the PC mode */
     Mode = (L->Reloc)? 'r' : ' ';
 
@@ -284,8 +286,17 @@ static char* MakeLineHeader (char* H, const ListLine* L)
     Depth = (L->Depth < 10)? L->Depth + '0' : '+';
 
     /* Format the line */
-    sprintf (H, "%06lX%c %c", L->PC, Mode, Depth);
-    memset (H+9, ' ', LINE_HEADER_LEN-9);
+    if (!SegList) {
+        Offset = 9;
+        sprintf (H, "%06lX%c %c", L->PC, Mode, Depth);
+    } else if (L->Reloc) {
+        Offset = 12;
+        sprintf (H, "%02X.%06lX%c %c",L->Seg, L->PC, Mode, Depth);
+    } else {
+        Offset = 12;
+        sprintf (H, "   %06lX%c %c", L->PC, Mode, Depth);
+    }
+    memset (H + Offset, ' ', LINE_HEADER_LEN - Offset - (SegList?0:3));
 
     /* Return the buffer */
     return H;
@@ -313,8 +324,11 @@ void CreateListing (void)
     PageNumber = 0;
     PrintPageHeader (F, LineList);
 
-    /* Terminate the header buffer. The last byte will never get overwritten */
-    HeaderBuf [LINE_HEADER_LEN] = '\0';
+    /* Terminate the header buffer. The last byte will never get overwritten
+    ** the - 3 adjust is for when the segnum gets prepended to the header.
+    */
+
+    HeaderBuf [(SegList ? LINE_HEADER_LEN : LINE_HEADER_LEN - 3)] = '\0';
 
     /* Walk through all listing lines */
     L = LineList;
@@ -426,7 +440,7 @@ void CreateListing (void)
             L->PC += Chunk;
 
             /* Copy the bytes into the line */
-            P = HeaderBuf + 11;
+            P = HeaderBuf + (SegList?14: 11);
             for (I = 0; I < Chunk; ++I) {
                 *P++ = *B++;
                 *P++ = *B++;
@@ -448,7 +462,9 @@ void CreateListing (void)
         L = L->Next;
 
     }
-
+    if (SegList) {
+        ListSegments (F);
+    }
     /* Close the listing file */
     (void) fclose (F);
 }
diff --git a/src/ca65/listing.h b/src/ca65/listing.h
index b1ae44291..425cb47b5 100644
--- a/src/ca65/listing.h
+++ b/src/ca65/listing.h
@@ -60,7 +60,7 @@ struct StrBuf;
 
 
 /* Length of the header of a listing line */
-#define LINE_HEADER_LEN         24
+#define LINE_HEADER_LEN         27
 
 /* One listing line as it is stored in memory */
 typedef struct ListLine ListLine;
@@ -68,6 +68,7 @@ struct ListLine {
     ListLine*           Next;           /* Pointer to next line */
     Fragment*           FragList;       /* List of fragments for this line */
     Fragment*           FragLast;       /* Last entry in fragment list */
+    unsigned            Seg;            /* Which segment this line targets */
     unsigned long       PC;             /* Program counter for this line */
     unsigned char       Reloc;          /* Relocatable mode? */
     unsigned char       File;           /* From which file is the line? */
diff --git a/src/ca65/main.c b/src/ca65/main.c
index 40a9bacaa..66a0f38af 100644
--- a/src/ca65/main.c
+++ b/src/ca65/main.c
@@ -107,6 +107,7 @@ static void Usage (void)
             "  -mm model\t\t\tSet the memory model\n"
             "  -o name\t\t\tName the output file\n"
             "  -s\t\t\t\tEnable smart mode\n"
+            "  -S\t\t\t\tEnable segment offset listing\n"
             "  -t sys\t\t\tSet the target system\n"
             "  -v\t\t\t\tIncrease verbosity\n"
             "  -x\t\t\t\tExpand macros\n"
@@ -132,6 +133,7 @@ static void Usage (void)
             "  --no-utf8\t\t\tDisable use of UTF-8 in diagnostics\n"
             "  --pagelength n\t\tSet the page length for the listing\n"
             "  --relax-checks\t\tRelax some checks (see docs)\n"
+            "  --segment-list\t\tEnable segment offset listing\n"
             "  --smart\t\t\tEnable smart mode\n"
             "  --target sys\t\t\tSet the target system\n"
             "  --verbose\t\t\tIncrease verbosity\n"
@@ -743,7 +745,12 @@ static void OptVersion (const char* Opt attribute ((unused)),
     exit (EXIT_SUCCESS);
 }
 
-
+static void OptSeglist (const char* Opt attribute ((unused)),
+    const char* Arg attribute ((unused)))
+    /* Enable segment listing */
+{
+    SegList = 1;
+}
 
 static void OptWarningsAsErrors (const char* Opt attribute ((unused)),
                                  const char* Arg attribute ((unused)))
@@ -1074,6 +1081,7 @@ int main (int argc, char* argv [])
         { "--no-utf8",             0,      OptNoUtf8               },
         { "--pagelength",          1,      OptPageLength           },
         { "--relax-checks",        0,      OptRelaxChecks          },
+        { "--segment-list",        0,      OptSeglist              },
         { "--smart",               0,      OptSmart                },
         { "--target",              1,      OptTarget               },
         { "--verbose",             0,      OptVerbose              },
@@ -1162,6 +1170,10 @@ int main (int argc, char* argv [])
                     OptSmart (Arg, 0);
                     break;
 
+                case 'S':
+                    OptSeglist (Arg, 0);
+                    break;
+
                 case 't':
                     OptTarget (Arg, GetArg (&I, 2));
                     break;
diff --git a/src/ca65/segment.c b/src/ca65/segment.c
index bd0838951..adc5cec98 100644
--- a/src/ca65/segment.c
+++ b/src/ca65/segment.c
@@ -476,7 +476,18 @@ void SegDump (void)
     printf ("\n");
 }
 
-
+void ListSegments (FILE* destination)
+{
+    /* summary of segments when seglist requested */
+    unsigned I;
+    fprintf (destination, "\nSegment summary\n\n");
+    for (I = 0; I < CollCount (&SegmentList); ++I) {
+        Segment* S = CollAtUnchecked (&SegmentList, I);
+        if(S->FragCount) {
+            fprintf (destination, "Segment: %02X = %s\n", S->Num, S->Def->Name);
+        }
+    }
+}
 
 void SegInit (void)
 /* Initialize segments */
diff --git a/src/ca65/segment.h b/src/ca65/segment.h
index 8e3dd2fdd..35430739b 100644
--- a/src/ca65/segment.h
+++ b/src/ca65/segment.h
@@ -36,7 +36,7 @@
 #ifndef SEGMENT_H
 #define SEGMENT_H
 
-
+#include <stdio.h>
 
 /* common */
 #include "coll.h"
@@ -95,6 +95,9 @@ extern Segment* ActiveSeg;
 Fragment* GenFragment (unsigned char Type, unsigned short Len);
 /* Generate a new fragment, add it to the current segment and return it. */
 
+void ListSegments (FILE* destination);
+/* List the segments to the given file when seglist set */
+
 void UseSeg (const SegDef* D);
 /* Use the given segment */