diff --git a/autogen.sh b/autogen.sh
index 2b486606e..edab80cbc 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -24,7 +24,7 @@ export LIBTOOLIZE
 
 ./update-version-h.sh
 
-autoreconf -fi -I ${ORIGDIR}/m4
+autoreconf -fi -I "${ORIGDIR}/m4"
 
 if test "$GETTEXTIZE"; then
   echo "Creating aclocal.m4 ..."