diff --git a/tools/mbspc/mbspc/l_cmd.h b/tools/mbspc/mbspc/l_cmd.h
index 2c919871..8ac167d2 100644
--- a/tools/mbspc/mbspc/l_cmd.h
+++ b/tools/mbspc/mbspc/l_cmd.h
@@ -42,9 +42,6 @@ typedef enum {false, true} qboolean;
 typedef unsigned char byte;
 #endif
 
-// the dec offsetof macro doesnt work very well...
-#define myoffsetof(type,identifier) ((size_t)&((type *)0)->identifier)
-
 
 // set these before calling CheckParm
 extern int myargc;
diff --git a/tools/quake2/common/cmdlib.h b/tools/quake2/common/cmdlib.h
index 2955d53f..a925a5f7 100644
--- a/tools/quake2/common/cmdlib.h
+++ b/tools/quake2/common/cmdlib.h
@@ -65,9 +65,6 @@ typedef unsigned char byte;
    #define SYS_ERR 3 // error
  */
 
-// the dec offsetof macro doesnt work very well...
-#define myoffsetof( type,identifier ) ( (size_t)& ( (type *)0 )->identifier )
-
 #define SAFE_MALLOC
 #ifdef SAFE_MALLOC
 void *safe_malloc( size_t size );
diff --git a/tools/quake2/qdata_heretic2/common/cmdlib.h b/tools/quake2/qdata_heretic2/common/cmdlib.h
index c94ce377..d68bc837 100644
--- a/tools/quake2/qdata_heretic2/common/cmdlib.h
+++ b/tools/quake2/qdata_heretic2/common/cmdlib.h
@@ -70,8 +70,6 @@
    #define SYS_WRN 2 // warnings
    #define SYS_ERR 3 // error
  */
-// the dec offsetof macro doesnt work very well...
-#define myoffsetof( type,identifier ) ( (size_t)& ( (type *)0 )->identifier )
 
 #define SAFE_MALLOC
 #ifdef SAFE_MALLOC
diff --git a/tools/quake3/common/cmdlib.h b/tools/quake3/common/cmdlib.h
index 499bff5a..eaa68111 100644
--- a/tools/quake3/common/cmdlib.h
+++ b/tools/quake3/common/cmdlib.h
@@ -60,9 +60,6 @@
 #endif
 #define MEM_BLOCKSIZE 4096
 
-// the dec offsetof macro doesnt work very well...
-#define myoffsetof( type,identifier ) ( (size_t)& ( (type *)0 )->identifier )
-
 #define SAFE_MALLOC
 #ifdef SAFE_MALLOC
 void *safe_malloc( size_t size );