diff --git a/src/nvim/os/provider.c b/src/nvim/os/provider.c
index 2e42cbb8f2..99cc078e94 100644
--- a/src/nvim/os/provider.c
+++ b/src/nvim/os/provider.c
@@ -109,6 +109,7 @@ Object provider_call(char *method, Object arg)
              "Provider for \"%s\" is not available",
              method);
     report_error(buf);
+    msgpack_rpc_free_object(arg);
     return NIL;
   }