diff --git a/src/replication.c b/src/replication.c
index a98d0d35..1962b3a4 100644
--- a/src/replication.c
+++ b/src/replication.c
@@ -296,7 +296,9 @@ void replicationFeedSlavesFromMasterStream(list *slaves, char *buf, size_t bufle
     listNode *ln;
     listIter li;
 
-    {
+    /* Debugging: this is handy to see the stream sent from master
+     * to slaves. Disabled with if(0). */
+    if (0) {
         printf("%zu:",buflen);
         for (size_t j = 0; j < buflen; j++) {
             printf("%c", isprint(buf[j]) ? buf[j] : '.');