diff --git a/modules/mux/dummy.c b/modules/mux/dummy.c
index e7aab6ddc7..72c320c4bb 100644
--- a/modules/mux/dummy.c
+++ b/modules/mux/dummy.c
@@ -110,12 +110,12 @@ static int Control( sout_mux_t *p_mux, int i_query, va_list args )
     switch( i_query )
     {
         case MUX_CAN_ADD_STREAM_WHILE_MUXING:
-            pb_bool = (bool*)va_arg( args, bool * );
+            pb_bool = va_arg( args, bool * );
             *pb_bool = true;
             return VLC_SUCCESS;
 
         case MUX_GET_ADD_STREAM_WAIT:
-            pb_bool = (bool*)va_arg( args, bool * );
+            pb_bool = va_arg( args, bool * );
             *pb_bool = false;
             return VLC_SUCCESS;