diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 5d304c89026..41b3b9b4d40 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,7 @@
 2011-11-26  Richard Henderson  <rth@redhat.com>
 
+	* optabs.c (init_sync_libfuncs_1): Include max in iteration.
+
 	* omp-low.c (expand_omp_atomic): Assume anything aligned to
 	BIGGEST_ALIGNMENT is aligned.
 
diff --git a/gcc/optabs.c b/gcc/optabs.c
index 1aafd28b5be..0ce21e9b548 100644
--- a/gcc/optabs.c
+++ b/gcc/optabs.c
@@ -6606,7 +6606,7 @@ init_sync_libfuncs_1 (optab tab, const char *base, int max)
   buf[len + 2] = '\0';
 
   mode = QImode;
-  for (i = 1; i < max; i *= 2)
+  for (i = 1; i <= max; i *= 2)
     {
       buf[len + 1] = '0' + i;
       set_optab_libfunc (tab, mode, buf);