diff --git a/src/include/globals.asm b/src/include/globals.asm
index 9d0a25e..4d63863 100644
--- a/src/include/globals.asm
+++ b/src/include/globals.asm
@@ -109,6 +109,7 @@ DEF SFX_DROP            EQU 8
 DEF SFX_LOCK            EQU 9
 DEF SFX_BELL            EQU 10
 DEF SFX_MOVE            EQU 11
+DEF STACK_SIZE          EQU 64
 
 
 ENDC