diff --git a/AFNetworking/AFHTTPClient.m b/AFNetworking/AFHTTPClient.m
index c13a524..a7b9569 100644
--- a/AFNetworking/AFHTTPClient.m
+++ b/AFNetworking/AFHTTPClient.m
@@ -1241,6 +1241,7 @@ typedef enum {
             _phase = AFFinalBoundaryPhase;
             break;
         case AFFinalBoundaryPhase:
+        default:
             _phase = AFEncapsulationBoundaryPhase;
             break;
     }