diff --git a/server/proxy/pf_channel.c b/server/proxy/pf_channel.c
index baec62ffe..bbbb5549b 100644
--- a/server/proxy/pf_channel.c
+++ b/server/proxy/pf_channel.c
@@ -94,8 +94,8 @@ PfChannelResult channelTracker_update(ChannelStateTracker* tracker, const BYTE*
                                       UINT32 flags, size_t totalSize)
 {
 	PfChannelResult result = PF_CHANNEL_RESULT_ERROR;
-	BOOL firstPacket = (flags & CHANNEL_FLAG_FIRST);
-	BOOL lastPacket = (flags & CHANNEL_FLAG_LAST);
+	BOOL firstPacket = (flags & CHANNEL_FLAG_FIRST) != 0;
+	BOOL lastPacket = (flags & CHANNEL_FLAG_LAST) != 0;
 
 	WINPR_ASSERT(tracker);