diff --git a/cmake/DVCS.cmake b/cmake/DVCS.cmake
index 37ec604..11b40c8 100644
--- a/cmake/DVCS.cmake
+++ b/cmake/DVCS.cmake
@@ -93,8 +93,8 @@ MACRO(GET_DVCS_INFO)
 		DVCS_CALL("revision" "-" id -i)
 	ELSEIF(GIT_FOUND)
 		DVCS_CALL("revision" "-" rev-parse --verify --short HEAD)
-		DVCS_EXECUTE(dvcs_dirty_wc diff --shortstat)
-		IF(DEFINED dvcs_dirty_wc)
+		DVCS_EXECUTE(dvcs_clean_wc diff-index --quiet HEAD)
+		IF(NOT DEFINED dvcs_clean_wc)
 			MESSAGE(STATUS "DVCS: dirty working copy")
 			SET(dvcs_revision ${dvcs_revision}+)
 			SET(VERSION_DVCS ${VERSION_DVCS}+)