diff --git a/src/gps/GPS.cpp b/src/gps/GPS.cpp
index ce5b18af8..47ba067d2 100644
--- a/src/gps/GPS.cpp
+++ b/src/gps/GPS.cpp
@@ -8,6 +8,7 @@
 
 #ifdef ARCH_PORTDUINO
 #include "meshUtils.h"
+#include <ctime>
 #endif
 
 #ifndef GPS_RESET_MODE