diff --git a/build_tools/make_build_h b/build_tools/make_build_h
index 1a62fc2383..cd6391a883 100755
--- a/build_tools/make_build_h
+++ b/build_tools/make_build_h
@@ -14,7 +14,7 @@ cat << END
 #define BUILD_KERNEL "${KERNEL}"
 #define BUILD_MACHINE "${MACHINE}"
 #define BUILD_OS "${OS}"
-#define BUILD_DATE "${DATE}"
+#define BUILD_DATE "${DATE} UTC"
 #define BUILD_USER "${USER}"
 
 END