diff --git a/src/gbm_mc.c b/src/gbm_mc.c
index 3f5536a..c4ec54b 100644
--- a/src/gbm_mc.c
+++ b/src/gbm_mc.c
@@ -164,6 +164,7 @@ void gbm(struct Option *opt)
 
 	for(i=0; i<NUM_THREADS; i++)
 		free(randoms[i]);
+	free(options);
 	free(randoms);
 	free(threads);
 }