diff --git a/code/qcommon/vm_interpreted.c b/code/qcommon/vm_interpreted.c
index 12fcfae9..8976b6eb 100644
--- a/code/qcommon/vm_interpreted.c
+++ b/code/qcommon/vm_interpreted.c
@@ -852,7 +852,7 @@ nextInstruction2:
 			opStack--;
 			goto nextInstruction;
 		case OP_BCOM:
-			opStack[-1] = ~ ((unsigned)r0);
+			*opStack = ~ ((unsigned)r0);
 			goto nextInstruction;
 
 		case OP_LSH: