diff --git a/src/bitdht/bdpeer.cc b/src/bitdht/bdpeer.cc
index 5abba60..1a586ed 100644
--- a/src/bitdht/bdpeer.cc
+++ b/src/bitdht/bdpeer.cc
@@ -978,6 +978,10 @@ bool bdSpace::findRandomPeerWithFlag(bdId &id, uint32_t withFlag)
 {
 	std::vector<bdBucket>::iterator it;
 	uint32_t totalcount = calcSpaceSizeWithFlag(withFlag);
+
+	if(totalcount == 0)
+		return false ;
+
 	uint32_t rnd = rand() % totalcount;
 	uint32_t i = 0;
 	uint32_t buck = 0;