diff --git a/Sming/Core/DateTime.cpp b/Sming/Core/DateTime.cpp
index b4636cc16a..4840e84841 100644
--- a/Sming/Core/DateTime.cpp
+++ b/Sming/Core/DateTime.cpp
@@ -17,8 +17,10 @@
 #if defined(__WIN32) || (defined(ARCH_ESP32) && ESP_IDF_VERSION_MAJOR < 5)
 static_assert(sizeof(time_t) != 8, "Great! Now supports 64-bit - please update code");
 #warning "**Y2038** time_t is only 32-bits in this build configuration"
+#elif defined(ARCH_HOST) && !defined(__USE_TIME_BITS64)
+#warning "**Y2038** Expecting 64-bit time_t - please use GCC 10 or later"
 #else
-static_assert(sizeof(time_t) == 8, "Expecting 64-bit time_t");
+static_assert(sizeof(time_t) == 8, "Expecting 64-bit time_t - please use GCC 10 or later");
 #endif
 
 namespace