diff --git a/src_main/core/pitime.cpp b/src_main/core/pitime.cpp
index f8bc3b16..8fcbb036 100755
--- a/src_main/core/pitime.cpp
+++ b/src_main/core/pitime.cpp
@@ -467,7 +467,7 @@ PICout operator <<(PICout s, const PIDateTime & v) {
 void msleep(int msecs) {Sleep(msecs);}
 #else
 #  ifdef FREERTOS
-	vTaskDelay(msecs / portTICK_PERIOD_MS);
+void msleep(int msecs) vTaskDelay(msecs / portTICK_PERIOD_MS);
 #  else
 void msleep(int msecs) {usleep(msecs * 1000);}
 #  endif