diff --git a/Makefile b/Makefile
index a1b0b74..55cd0da 100644
--- a/Makefile
+++ b/Makefile
@@ -6,6 +6,7 @@ build:
 clean:
 	$(PYTHON) setup.py clean
 	rm -rf build
+	rm -f smartcard/scard/_scard*.so
 
 pypi: clean
 	# files generated by swig