1 files changed, 1 insertions, 1 deletions
diff --git a/gas/as.h b/gas/as.h
index 7366121b03a..1d1d97e5a06 100644
--- a/gas/as.h
+++ b/gas/as.h
@@ -238,7 +238,7 @@ typedef addressT valueT;
 #define know(p) gas_assert(p)	/* Verify our assumptions!  */
 #endif /* not yet defined */
 #else
-#define know(p)			/* know() checks are no-op.ed  */
+#define know(p)	do {} while (0)	/* know() checks are no-op.ed  */
 #endif
 
 /* input_scrub.c */