diff --git a/setup.py b/setup.py
index d687d39f2..140028d80 100644
--- a/setup.py
+++ b/setup.py
@@ -756,6 +756,9 @@ def get_mupdf():
     libraries=libraries,
     extra_compile_args=extra_compile_args,
     extra_link_args=extra_link_args,
+    # Disable bogus SWIG warning 509, 'Overloaded method ... effectively
+    # ignored, as it is shadowed by ...'.
+    swig_opts=['-w509']
 )