diff --git a/src/algo_utils.c b/src/algo_utils.c
index 2180345..33c744a 100644
--- a/src/algo_utils.c
+++ b/src/algo_utils.c
@@ -16,7 +16,7 @@ void free_naive(void* app_ctx) {
 
 void iterate(int* fd, GQueue* q, int* waiting_count) {
   fprintf(stderr, "Queue for fd=%d has length=%d\n", *fd, q->length);
-  waiting_count += q->length;
+  *waiting_count += q->length;
 }
 
 void iterate2(int* fd, struct buffer_packet *bp, gpointer user_data) {