diff --git a/src/context/context.rs b/src/context/context.rs
index 3dbfc4d55b..0211abe87a 100644
--- a/src/context/context.rs
+++ b/src/context/context.rs
@@ -413,7 +413,12 @@ impl Context {
         i: FileHandle,
         lock_token: &mut LockToken<L4>,
     ) -> Option<FileDescriptor> {
-        self.files.write(lock_token.token()).remove_file(i)
+        let is_upper = i.get() & syscall::UPPER_FDTBL_TAG != 0;
+        let result = self.files.write(lock_token.token()).remove_file(i);
+        if is_upper && result.is_some() {
+            crate::info!("Context::remove_file ctx={} upper_idx={}", self.name, i.get());
+        }
+        result
     }
 
     /// Bulk remove files