diff --git a/communication_techniques/src/communication/c_cache.c b/communication_techniques/src/communication/c_cache.c
index e0da7c9..8914f68 100644
--- a/communication_techniques/src/communication/c_cache.c
+++ b/communication_techniques/src/communication/c_cache.c
@@ -82,11 +82,11 @@ void *recv_one_data(void)
 	static __thread int i;
 	void *result;
 
-	if (unlikely(i % (BUF_SIZE / sizeof(void *))))
+	if (unlikely(!(i % (BUF_SIZE / sizeof(void *)))))
 		while (!comm.cons->channel->state);
 	result = (void *) comm.cons->channel->buf[i++];
 	i %= (2 * BUF_SIZE) / sizeof(void *);
-	if (unlikely(i % (BUF_SIZE / sizeof(void *))))
+	if (unlikely(!(i % (BUF_SIZE / sizeof(void *)))))
 		comm.cons->channel->state = 0;
 	return result;
 }