diff --git a/gui/simple-greeter/gdm-clock-widget.c b/gui/simple-greeter/gdm-clock-widget.c
index 9008e6d..b3e6da8 100644
--- a/gui/simple-greeter/gdm-clock-widget.c
+++ b/gui/simple-greeter/gdm-clock-widget.c
@@ -83,6 +83,7 @@ update_time_format (GdmClockWidget *clock)
                 clock_format = _("%a %l:%M:%S %p");
 
                 /* translators: This is the time format to use for the date
+                 * xgettext:no-c-format
                  */
                 tooltip_format = _("%x");
         } else {
@@ -91,6 +92,9 @@ update_time_format (GdmClockWidget *clock)
                  */
                 clock_format = _("%a %l:%M %p");
 
+                /* translators: This is the time format to use for the date
+                 * xgettext:no-c-format
+                 */
                 tooltip_format = _("%x");
         }
 
