diff --git a/make/rpmdist.mk b/make/rpmdist.mk
index e202a030..43568547 100644
--- a/make/rpmdist.mk
+++ b/make/rpmdist.mk
@@ -165,6 +165,10 @@ define increase_build_number
 	cvs commit -m "o $(RPM_VERSION)" HASH VERSION
 endef
 
+define check_reinstall_old
+	(make rpm-uninstall && make rpm-install)
+endef
+
 md5: 
 	echo $(HASH) > HASH
 
@@ -175,8 +179,9 @@ rpm-update-release:
 	@if [ "`cat HASH`" != "$(HASH)" ]; then \
 		echo + source was modified ;\
 		$(increase_build_number) ;\
-	else \
-		echo + source is unmodified ;\
+	elif ! $(check_reinstall_old); then \
+		echo "+ old rpm is uninstallable" ;\
+		$(increase_build_number) ;\
 	fi
 
 rpm-check-release: