diff --git a/tools/print_signatures.py b/tools/print_signatures.py
index 2615b4ec23d3265c639fab50dcea07d67937eb36..19378d50f8845ed677d767ca16167073b801c966 100644
--- a/tools/print_signatures.py
+++ b/tools/print_signatures.py
@@ -124,6 +124,9 @@ def visit_all_module(mod):
     if mod_name != 'paddle' and not mod_name.startswith('paddle.'):
         return
 
+    if mod_name.startswith('paddle.fluid.core'):
+        return
+
     if mod in visited_modules:
         return