diff --git a/git-version.cmake b/git-version.cmake
index ff276d7f59..9ff7757dce 100644
--- a/git-version.cmake
+++ b/git-version.cmake
@@ -3,7 +3,7 @@ set(GIT_VERSION "unknown")
 set(GIT_VERSION_UPDATE "1")
 
 find_package(Git)
-if(GIT_FOUND AND EXISTS ".git")
+if(GIT_FOUND AND EXISTS "${SOURCE_DIR}/.git/")
 	execute_process(COMMAND ${GIT_EXECUTABLE} describe --always
 		WORKING_DIRECTORY ${SOURCE_DIR}
 		RESULT_VARIABLE exit_code