fix #138
diff --git a/src/main.c b/src/main.c
index a449f8a..cb7108b 100644
--- a/src/main.c
+++ b/src/main.c
@@ -803,8 +803,8 @@ int main(int argc, char * argv[]) {
FILE *input_des = NULL, *output_des = NULL;
- output_des = mode != MODE_TEST ? open_output(output, force) : NULL;
input_des = open_input(input);
+ output_des = mode != MODE_TEST ? open_output(output, force) : NULL;
if (output != f2) free(output);
