diff --git a/src/Makefile.am b/src/Makefile.am
index cca7cf40..f0872b7c 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -759,5 +759,5 @@ dist-hook:
 	(cd $(top_srcdir); find . \
             \( -name '*.pyc' -o -name '#*' -o -name '*~' \) -delete)
 	test -z "`git status -s | grep -v '??' | grep -v Makefile.am`"
-        vers=`echo $(VERSION) | sed -e 's/~/_/g'`;\
+	vers=`echo $(VERSION) | sed -e 's/~/_/g'`;\
 	git tag -a RECOLL-$$vers -m "Release $$vers tagged"