diff --git a/version.cmake b/version.cmake
index 5ec40e6bf..69c41c4a7 100644
--- a/version.cmake
+++ b/version.cmake
@@ -32,6 +32,16 @@ else()
 	endif()
 endif()
 
+if(NOT GIT_COMMIT)
+	set(GIT_COMMIT "(unknown)")
+endif()
+if(NOT GIT_COMMIT_SHORT)
+	set(GIT_COMMIT_SHORT "(unknown)")
+endif()
+if(NOT GIT_BRANCH)
+	set(GIT_BRANCH "(unknown)")
+endif()
+
 if(CONFIG_FILE AND OUT_FILE)
 	configure_file("${CONFIG_FILE}" "${OUT_FILE}")
 endif()