diff --git a/glib.supp b/glib.supp
index 2c20b1238..00c8dedc9 100644
--- a/glib.supp
+++ b/glib.supp
@@ -322,6 +322,16 @@
 	fun:type_class_init_Wm
 }
 
+{
+        g-type-class-ref
+        Memcheck:Leak
+        fun:calloc
+        ...
+        fun:type_class_init_Wm
+        ...
+        fun:g_type_class_ref
+}
+
 {
 	g-io-module-default-singleton-malloc
 	Memcheck:Leak