diff --git a/makefile b/makefile
index 93f21eb0..dc48830b 100644
--- a/makefile
+++ b/makefile
@@ -290,10 +290,10 @@ ifeq (${WIN32},)  #*nix Environments (&& cygwin)
     else
       NEED_COMMIT_ID = need-commit-id
     endif
-    ifeq (need-commit-id,$(NEED_COMMIT_ID))
-      ifneq (,$(shell git update-index --refresh --))
-        GIT_EXTRA_FILES=+uncommitted-changes
-      endif
+    ifneq (,$(shell git update-index --refresh --))
+      GIT_EXTRA_FILES=+uncommitted-changes
+    endif
+    ifneq (,$(or $(NEED_COMMIT_ID),$(GIT_EXTRA_FILES)))
       isodate=$(shell git log -1 --pretty="%ai"|sed -e 's/ /T/'|sed -e 's/ //')
       $(shell git log -1 --pretty="SIM_GIT_COMMIT_ID %H$(GIT_EXTRA_FILES)%nSIM_GIT_COMMIT_TIME $(isodate)" >.git-commit-id)
     endif