diff --git a/src/gui/components/cc_frm_header.h b/src/gui/components/cc_frm_header.h
index 1a06a5a76..ee36f3483 100644
--- a/src/gui/components/cc_frm_header.h
+++ b/src/gui/components/cc_frm_header.h
@@ -335,7 +335,7 @@ class CComponentsHeader : public CComponentsForm, public CCTextScreen, CCHeaderT
 		CComponentsFrmClock* getClockObject(){return cch_cl_obj;}
 
 		///enable display of clock, parameter bool enable, const char* format, bool run
-		void enableClock(bool enable = true, const char* format = "%H:%M", const char* sec_format_str = NULL, bool run = false);
+		void enableClock(bool enable = true, const char* format = "%H:%M", const char* sec_format_str = "%H %M", bool run = true);
 		///disable clock, without parameter
 		void disableClock();