diff --git a/libsrc/common/_printf.s b/libsrc/common/_printf.s
index a71f894df..dffeb64d1 100644
--- a/libsrc/common/_printf.s
+++ b/libsrc/common/_printf.s
@@ -682,7 +682,7 @@ HaveArg:
 	lda	Prec+1
 	tay
 	sbc	ArgLen+1
-	bcc	@L1
+        bcs	@L1
 	stx	ArgLen
 	sty	ArgLen+1