diff --git a/vm/nga-c/retro-compiler.c b/vm/nga-c/retro-compiler.c
index 736d890..6f62ec4 100644
--- a/vm/nga-c/retro-compiler.c
+++ b/vm/nga-c/retro-compiler.c
@@ -86,7 +86,6 @@ void read_token(FILE *file, char *token_buffer, int echo);
    Retro language. If things change there, these will need to
    be adjusted to match. */
 
-#define TIB            1025
 #define D_OFFSET_LINK     0
 #define D_OFFSET_XT       1
 #define D_OFFSET_CLASS    2