1 files changed, 1 insertions, 1 deletions
diff --git a/Swiften/Client/ClientSession.cpp b/Swiften/Client/ClientSession.cpp
index 55e0bc2..bfc9313 100644
--- a/Swiften/Client/ClientSession.cpp
+++ b/Swiften/Client/ClientSession.cpp
@@ -175,19 +175,19 @@ void ClientSession::handleElement(boost::shared_ptr<Element> element) {
 		}
 
 		if (streamFeatures->hasStartTLS() && stream->supportsTLSEncryption() && useTLS != NeverUseTLS) {
 			state = WaitingForEncrypt;
 			stream->writeElement(boost::make_shared<StartTLSRequest>());
 		}
 		else if (useTLS == RequireTLS && !stream->isTLSEncrypted()) {
 			finishSession(Error::NoSupportedAuthMechanismsError);
 		}
-		else if (useStreamCompression && streamFeatures->hasCompressionMethod("zlib")) {
+		else if (useStreamCompression && stream->supportsZLibCompression() && streamFeatures->hasCompressionMethod("zlib")) {
 			state = Compressing;
 			stream->writeElement(boost::make_shared<CompressRequest>("zlib"));
 		}
 		else if (streamFeatures->hasAuthenticationMechanisms()) {
 			if (stream->hasTLSCertificate()) {
 				if (streamFeatures->hasAuthenticationMechanism("EXTERNAL")) {
 					state = Authenticating;
 					stream->writeElement(boost::make_shared<AuthRequest>("EXTERNAL", createSafeByteArray("")));
 				}