diff --git a/glib/tests/slice.c b/glib/tests/slice.c
index cb1c52787..c2226cd56 100644
--- a/glib/tests/slice.c
+++ b/glib/tests/slice.c
@@ -1,7 +1,7 @@
 #include <glib.h>
 
 /* We test deprecated functionality here */
-#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+G_GNUC_BEGIN_IGNORE_DEPRECATIONS
 
 static void
 test_slice_config_subprocess (void)