diff --git a/sofort/cfgtest.sh b/sofort/cfgtest.sh
index a0dcc64..bd661c0 100644
--- a/sofort/cfgtest.sh
+++ b/sofort/cfgtest.sh
@@ -57,7 +57,9 @@ cfgtest_makevar_append()
 	mb_internal_str='+='
 
 	for mb_internal_arg ; do
-		mb_internal_str="$mb_internal_str $mb_internal_arg"
+		if ! [ -z "$mb_internal_arg" ]; then
+			mb_internal_str="$mb_internal_str $mb_internal_arg"
+		fi
 	done
 
 	printf '%-24s%s\n' "$mb_cfgtest_makevar" "$mb_internal_str" \