diff --git a/service.sh b/service.sh
index de7fe90..49e9af8 100755
--- a/service.sh
+++ b/service.sh
@@ -14,5 +14,5 @@ while true; do
     fi
 
     [ "${SCREEN_ON}" = false ] && TS_CHECKED=false    
-    usleep "${FREQ}"
+    /system/bin/usleep "${FREQ}"
 done