diff --git a/src/zm_stream.h b/src/zm_stream.h
index 0eb25ef7b..3d46e8e98 100644
--- a/src/zm_stream.h
+++ b/src/zm_stream.h
@@ -47,12 +47,12 @@ protected:
 
 protected:
     typedef struct {
-        long msg_type;
+        int msg_type;
         char msg_data[16];
     } CmdMsg;
 
     typedef struct {
-        long msg_type;
+        int msg_type;
         char msg_data[256];
     } DataMsg;