diff --git a/libfuse/lib/fuse_lowlevel.cpp b/libfuse/lib/fuse_lowlevel.cpp
index bf580195..c4e4f577 100644
--- a/libfuse/lib/fuse_lowlevel.cpp
+++ b/libfuse/lib/fuse_lowlevel.cpp
@@ -1794,6 +1794,8 @@ fuse_ll_buf_process_read(struct fuse_session *se_,
   req->ctx.umask  = 0;
   req->ch         = se_->ch;
 
+  debug_fuse_in_header(in);
+
   err = ENOSYS;
   if(in->opcode >= FUSE_MAXOPS)
     goto reply_err;