diff --git a/libfuse/lib/fuse_lowlevel.cpp b/libfuse/lib/fuse_lowlevel.cpp
index 325cdb8d..9449b428 100644
--- a/libfuse/lib/fuse_lowlevel.cpp
+++ b/libfuse/lib/fuse_lowlevel.cpp
@@ -150,6 +150,9 @@ fuse_send_msg(struct fuse_ll   *f,
   if(rv == -1)
     return -errno;
 
+  if(out->error)
+    abort();
+
   return 0;
 }