diff --git a/slcl-upload b/slcl-upload
index 8b0d8d9..42a546e 100755
--- a/slcl-upload
+++ b/slcl-upload
@@ -121,7 +121,7 @@ upload_dir()
 				--fail-with-body \
 				-b "$cookie" \
 				-F dir="$dir$src/" \
-				-F "file=@$src/$f;filename=$(basename "$f")" \
+				-F "file=@$src/$f;filename=$(basename -- "$f")" \
 				"$(escape_url "$url/upload")"
 			do
 				printf "[retrying]"