diff --git a/glib/tests/mem-overflow.c b/glib/tests/mem-overflow.c
index e0c28e5e3..5e5dd68c0 100644
--- a/glib/tests/mem-overflow.c
+++ b/glib/tests/mem-overflow.c
@@ -23,6 +23,8 @@
 
 #ifdef __GNUC__
 #pragma GCC optimize (1)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Walloc-size-larger-than="
 #endif
 
 #include "glib.h"
@@ -198,6 +200,10 @@ empty_alloc (void)
 }
 #endif
 
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
+
 int
 main (int   argc,
       char *argv[])