diff --git a/SignalServiceKit/src/Protocols/ProtoBuf+OWS.m b/SignalServiceKit/src/Protocols/ProtoBuf+OWS.m
index 98d91db72..0f6a8e500 100644
--- a/SignalServiceKit/src/Protocols/ProtoBuf+OWS.m
+++ b/SignalServiceKit/src/Protocols/ProtoBuf+OWS.m
@@ -55,7 +55,10 @@ NS_ASSUME_NONNULL_BEGIN
             // Once we've shared our profile key with a user (perhaps due to being
             // a member of a whitelisted group), make sure they're whitelisted.
             id<ProfileManagerProtocol> profileManager = [TextSecureKitEnv sharedEnv].profileManager;
-            [profileManager addUserToProfileWhitelist:recipientId];
+            // FIXME PERF avoid this dispatch. It's going to happen for *each* recipient in a group message.
+            dispatch_async(dispatch_get_main_queue(), ^{
+                [profileManager addUserToProfileWhitelist:recipientId];
+            });
         }
     }
 }