diff --git a/mist/stun.cpp b/mist/stun.cpp
index b8ffc3b..987b97e 100644
--- a/mist/stun.cpp
+++ b/mist/stun.cpp
@@ -179,7 +179,8 @@ bool getExternalAddressPortIP4(int proto, unsigned short localPort, PSOCKADDR_IN
             printf("STUN attribute out of bounds: %d\n", htons(attribute->length));
             return false;
         }
-        else if (htons(attribute->type) != STUN_ATTRIBUTE_XOR_MAPPED_ADDRESS) {
+        // Mask off the comprehension bit
+        else if ((htons(attribute->type) & 0x7FFF) != STUN_ATTRIBUTE_XOR_MAPPED_ADDRESS) {
             // Continue searching if this wasn't our address
             bytesRead -= sizeof(*attribute) + htons(attribute->length);
             attribute = (PSTUN_ATTRIBUTE_HEADER)(((char*)attribute) + sizeof(*attribute) + htons(attribute->length));