diff --git a/include/osdep_service.h b/include/osdep_service.h
index 1bdc7b6..aa34578 100644
--- a/include/osdep_service.h
+++ b/include/osdep_service.h
@@ -424,15 +424,8 @@ extern void	rtw_usleep_os(int us);
 
 extern u32	rtw_atoi(u8* s);
 
-#ifdef DBG_DELAY_OS
-#define rtw_mdelay_os(ms) _rtw_mdelay_os((ms), __func__, __LINE__)
-#define rtw_udelay_os(ms) _rtw_udelay_os((ms), __func__, __LINE__)
-extern void _rtw_mdelay_os(int ms, const char *func, const int line);
-extern void _rtw_udelay_os(int us, const char *func, const int line);
-#else
 extern void	rtw_mdelay_os(int ms);
 extern void	rtw_udelay_os(int us);
-#endif
 
 extern void rtw_yield_os(void);
 
diff --git a/os_dep/osdep_service.c b/os_dep/osdep_service.c
index d0813c2..1996cec 100644
--- a/os_dep/osdep_service.c
+++ b/os_dep/osdep_service.c
@@ -296,20 +296,6 @@ void rtw_usleep_os(int us)
 		msleep( (us/1000) + 1);
 }
 
-#ifdef DBG_DELAY_OS
-void _rtw_mdelay_os(int ms, const char *func, const int line)
-{
-	DBG_88E("%s:%d %s(%d)\n", func, line, __func__, ms);
-
-	mdelay((unsigned long)ms);
-}
-
-void _rtw_udelay_os(int us, const char *func, const int line)
-{
-	DBG_88E("%s:%d %s(%d)\n", func, line, __func__, us);
-	udelay((unsigned long)us);
-}
-#else
 void rtw_mdelay_os(int ms)
 {
 	mdelay((unsigned long)ms);
@@ -319,7 +305,6 @@ void rtw_udelay_os(int us)
 {
       udelay((unsigned long)us);
 }
-#endif
 
 void rtw_yield_os(void)
 {