diff --git a/servers/mac b/servers/mac
index ee8b5a1..2f5b972 100755
--- a/servers/mac
+++ b/servers/mac
@@ -272,7 +272,7 @@ class _ProtocolHandler:
 
     # Used to extract protocol id and args from a raw message.
     self.protocolRePattern = (
-      r"((?P<blockId>[a-z\-]*) {(?P<blockArg>[\s\S]*))|((?P<spaceId>[a-z_]*) (?P<spaceArg>[\s\S]*))|(?P<id>[a-z_]*)")
+      r"((?P<blockId>[a-z_]*) {(?P<blockArg>[\s\S]*)})|((?P<spaceId>[a-z_]*) (?P<spaceArg>[\s\S]*))|(?P<id>[a-z_]*)")
     # Used to detect multiple dispatches during processing of one chunk set.
     self.isProcessing = False