diff --git a/src/ca65/objcode.h b/src/ca65/objcode.h
index 96fa50100..8387ba576 100644
--- a/src/ca65/objcode.h
+++ b/src/ca65/objcode.h
@@ -56,12 +56,12 @@
 extern int 	RelocMode;
 
 /* Definitions for predefined segments */
-SegDef NullSegDef;
-SegDef ZeropageSegDef;
-SegDef DataSegDef;
-SegDef BssSegDef;
-SegDef RODataSegDef;
-SegDef CodeSegDef;
+extern SegDef NullSegDef;
+extern SegDef ZeropageSegDef;
+extern SegDef DataSegDef;
+extern SegDef BssSegDef;
+extern SegDef RODataSegDef;
+extern SegDef CodeSegDef;
 
 
 
diff --git a/src/ca65/pseudo.c b/src/ca65/pseudo.c
index 2a25be6fa..1c7314308 100644
--- a/src/ca65/pseudo.c
+++ b/src/ca65/pseudo.c
@@ -1247,7 +1247,9 @@ static void DoSegment (void)
 	"FAR", "LONG"
     };
     char Name [sizeof (SVal)];
-    SegDef Def = { Name, SEGTYPE_DEFAULT };
+    SegDef Def;
+    Def.Name = Name;
+    Def.Type = SEGTYPE_DEFAULT;
 
     if (Tok != TOK_STRCON) {
 	ErrorSkip (ERR_STRCON_EXPECTED);