diff --git a/src/Handler.cpp b/src/Handler.cpp
index b29bdf4..a35c4b2 100644
--- a/src/Handler.cpp
+++ b/src/Handler.cpp
@@ -639,6 +639,7 @@ bool Handler::preHandleRequest(Request* req, const String& key)
         return true;
     case Command::Watch:
     case Command::Multi:
+    case Command::Exec:
         if (!mProxy->supportTransaction()) {
             directResponse(req, Response::ForbidTransaction);
             return true;