diff --git a/libfuse/lib/fuse_lowlevel.cpp b/libfuse/lib/fuse_lowlevel.cpp
index c4e4f577..812e1370 100644
--- a/libfuse/lib/fuse_lowlevel.cpp
+++ b/libfuse/lib/fuse_lowlevel.cpp
@@ -1794,7 +1794,8 @@ fuse_ll_buf_process_read(struct fuse_session *se_,
   req->ctx.umask  = 0;
   req->ch         = se_->ch;
 
-  debug_fuse_in_header(in);
+  if(fuse_cfg.debug)
+    debug_fuse_in_header(in);
 
   err = ENOSYS;
   if(in->opcode >= FUSE_MAXOPS)