diff --git a/libfuse/lib/debug.cpp b/libfuse/lib/debug.cpp
index d1af3b79..a076446f 100644
--- a/libfuse/lib/debug.cpp
+++ b/libfuse/lib/debug.cpp
@@ -1278,7 +1278,7 @@ debug_fuse_in_header(const struct fuse_in_header *hdr_)
 void
 debug_fuse_out_header(const struct fuse_out_header *hdr_)
 {
-  if(hdr_->error == ENOENT)
+  if(hdr_->error == -ENOENT)
     __builtin_trap();
   fmt::print(g_OUTPUT,
              "unique=0x{:016x};"