diff --git a/src/uas/UAS.cc b/src/uas/UAS.cc
index b895e5ad9f88d3d87f304e8f708484e2464a274e..36b7c0a875603b534b29e86a95f34830eafa53f4 100644
--- a/src/uas/UAS.cc
+++ b/src/uas/UAS.cc
@@ -729,7 +729,11 @@ quint64 UAS::getUnixTime(quint64 time)
     // 60 seconds
     // 1000 milliseconds
     // 1000 microseconds
+#ifndef _MSVC_VER
+    else if (time < 1261440000000000LLU)
+#else
     else if (time < 1261440000000000)
+#endif
     {
         if (onboardTimeOffset == 0)
         {