diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 79554ff3af..14fd2e8612 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -13178,7 +13178,7 @@ gtk_widget_remove_style_class (GtkWidget  *widget,
   g_return_if_fail (style_class[0] != '\0');
   g_return_if_fail (style_class[0] != '.');
 
-  class_quark = g_quark_from_string (style_class);
+  class_quark = g_quark_try_string (style_class);
   if (!class_quark)
     return;
 
@@ -13208,7 +13208,7 @@ gtk_widget_has_style_class (GtkWidget  *widget,
   g_return_val_if_fail (style_class[0] != '\0', FALSE);
   g_return_val_if_fail (style_class[0] != '.', FALSE);
 
-  class_quark = g_quark_from_string (style_class);
+  class_quark = g_quark_try_string (style_class);
   if (!class_quark)
     return FALSE;