diff --git a/rhizome_fetch.c b/rhizome_fetch.c
index 8b9a4d16..4a4f2445 100644
--- a/rhizome_fetch.c
+++ b/rhizome_fetch.c
@@ -1368,6 +1368,10 @@ int rhizome_received_content(unsigned char *bidprefix,
       rhizome_fetch_mdp_requestblocks(slot);
     }
     RETURN(0);
+  } else {
+    if (config.debug.rhizome)
+      DEBUGF("Ignoring received block: slot=%p, version=%016llx, slot->bidVersion=%016llx, slot->state=%d (should be %d)",
+	     slot,version,slot->bidVersion,slot->state,RHIZOME_FETCH_RXFILEMDP);
   }
   
   // if we get a packet containing an entire payload