diff --git a/src/lisp/x86-assem.S b/src/lisp/x86-assem.S
index 555706078654e9aeae5e93e3041cecebff3a1438..1c166b0d964ee6bf886382c03d0953ef2757a6d9 100644
--- a/src/lisp/x86-assem.S
+++ b/src/lisp/x86-assem.S
@@ -71,7 +71,7 @@ GNAME(x):			;
 #define STACK_PROLOGUE(bytes) \
 	pushl	%ebp		; \
 	mov	%esp, %ebp	; \
-	subl	$##bytes, %esp	; \
+	subl	$bytes, %esp	; \
 	andl	$-16, %esp	; 
 
 /* Undo STACK_PROLOGUE */