diff --git a/src/ca65/make/gcc.mak b/src/ca65/make/gcc.mak
index 788c35338..028879ff4 100644
--- a/src/ca65/make/gcc.mak
+++ b/src/ca65/make/gcc.mak
@@ -5,7 +5,7 @@
 # Library dir
 COMMON	= ../common
 
-CFLAGS 	= -g -O2 -Wall -Wsign-compare -I$(COMMON)
+CFLAGS 	= -g -O2 -Wall -W -Wno-unused-parameter -I$(COMMON)
 CC	= gcc
 EBIND	= emxbind
 LDFLAGS	=
diff --git a/src/ca65/objfile.c b/src/ca65/objfile.c
index 867f771ab..c8859f5fc 100644
--- a/src/ca65/objfile.c
+++ b/src/ca65/objfile.c
@@ -64,7 +64,8 @@ static FILE* F = 0;
 /* Header structure */
 static ObjHeader Header = {
     OBJ_MAGIC,
-    OBJ_VERSION
+    OBJ_VERSION,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
 };
 
 
@@ -243,7 +244,7 @@ void ObjWriteStr (const char* S)
      */
     ObjWriteVar (Len);
     ObjWriteData (S, Len);
-}			       
+}