diff --git a/targets/TARGET_Samsung/TARGET_SIDK_S1SBP6A/watchdog_api.c b/targets/TARGET_Samsung/TARGET_SIDK_S1SBP6A/watchdog_api.c
index 5a73b01853a..8de4fe45f4a 100644
--- a/targets/TARGET_Samsung/TARGET_SIDK_S1SBP6A/watchdog_api.c
+++ b/targets/TARGET_Samsung/TARGET_SIDK_S1SBP6A/watchdog_api.c
@@ -25,7 +25,6 @@
 
 #include <string.h>
 #include <stdio.h>
-#include "cmsis_os.h"
 #include "cmsis.h"
 #include "watchdog_api.h"