diff --git a/simplecpp.cpp b/simplecpp.cpp
index 9ff66d8..3e892ff 100755
--- a/simplecpp.cpp
+++ b/simplecpp.cpp
@@ -3440,7 +3440,7 @@ static std::string getDateDefine(const struct tm *timep)
 static std::string getTimeDefine(const struct tm *timep)
 {
     char buf[] = "??:??:??";
-    strftime(buf, sizeof(buf), "%T", timep);
+    strftime(buf, sizeof(buf), "%H:%M:%S", timep);
     return std::string("\"").append(buf).append("\"");
 }