diff --git a/libretroshare/src/pqi/pqissl.cc b/libretroshare/src/pqi/pqissl.cc
index 5809081f2..f329b5f01 100644
--- a/libretroshare/src/pqi/pqissl.cc
+++ b/libretroshare/src/pqi/pqissl.cc
@@ -747,6 +747,9 @@ int 	pqissl::Basic_Connection_Complete()
 	FD_ZERO(&WriteFDs);
 	FD_ZERO(&ExceptFDs);
 
+	if(sockfd < 0)
+		return -1 ;
+
 	FD_SET(sockfd, &ReadFDs);
 	FD_SET(sockfd, &WriteFDs);
 	FD_SET(sockfd, &ExceptFDs);