diff --git a/DPlusAuthenticator.cpp b/DPlusAuthenticator.cpp
index d6f0246..2b8a91c 100644
--- a/DPlusAuthenticator.cpp
+++ b/DPlusAuthenticator.cpp
@@ -76,7 +76,7 @@ bool CDPlusAuthenticator::authenticate(const std::string &callsign, std::map<std
 		return true;
 	}
 
-	ret = client.read(buffer, 2U);
+	int ret = client.read(buffer, 2U);
 	size_t sofar = gwy_map.size();
 
 	while (ret == 2) {