===================================================================
RCS file: /cvs/src/src/gas/as.h,v
retrieving revision 1.64
retrieving revision 1.64.2.1
diff -u -r1.64 -r1.64.2.1
--- src/gas/as.h	2009/09/03 12:54:21	1.64
+++ src/gas/as.h	2009/12/03 10:40:25	1.64.2.1
@@ -238,7 +238,7 @@
 #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 */