diff --git a/gtk/gtkimcontextsimple.c b/gtk/gtkimcontextsimple.c
index 9ef18a9b8b..d496166dff 100644
--- a/gtk/gtkimcontextsimple.c
+++ b/gtk/gtkimcontextsimple.c
@@ -871,7 +871,7 @@ gtk_im_context_simple_filter_keypress (GtkIMContext *context,
       (context_simple->in_hex_sequence && !hex_keyval && 
        !is_hex_start && !is_hex_end && !is_escape && !is_backspace))
     {
-      if (event->state & (GDK_MOD1_MASK | GDK_CONTROL_MASK) ||
+      if (event->state & GTK_NO_TEXT_INPUT_MOD_MASK ||
 	  (context_simple->in_hex_sequence && context_simple->modifiers_dropped &&
 	   (event->keyval == GDK_Return || 
 	    event->keyval == GDK_ISO_Enter ||
diff --git a/gtk/gtkimmulticontext.c b/gtk/gtkimmulticontext.c
index 61856679a0..34f34b6b9d 100644
--- a/gtk/gtkimmulticontext.c
+++ b/gtk/gtkimmulticontext.c
@@ -330,7 +330,7 @@ gtk_im_multicontext_filter_keypress (GtkIMContext *context,
   if (slave)
     return gtk_im_context_filter_keypress (slave, event);
   else if (event->type == GDK_KEY_PRESS &&
-           (event->state & (GDK_MOD1_MASK | GDK_CONTROL_MASK)) == 0)
+           (event->state & GTK_NO_TEXT_INPUT_MOD_MASK) == 0)
     {
       gunichar ch;
 
diff --git a/gtk/gtkprivate.h b/gtk/gtkprivate.h
index 7ba5a5db62..9e1feb9032 100644
--- a/gtk/gtkprivate.h
+++ b/gtk/gtkprivate.h
@@ -112,6 +112,16 @@ gboolean _gtk_fnmatch (const char *pattern,
 #define GTK_DEFAULT_ACCEL_MOD_MASK GDK_META_MASK
 #endif
 
+/* When any of these modifiers are active, a key
+ * event cannot produce a symbol, so should be
+ * skipped when handling text input
+ */
+#ifndef GDK_WINDOWING_QUARTZ
+#define GTK_NO_TEXT_INPUT_MOD_MASK (GDK_MOD1_MASK | GDK_CONTROL_MASK)
+#else
+#define GTK_NO_TEXT_INPUT_MOD_MASK (GDK_MOD2_MASK | GDK_CONTROL_MASK)
+#endif
+
 G_END_DECLS
 
 #endif /* __GTK_PRIVATE_H__ */