diff --git a/py-smbus/Module.mk b/py-smbus/Module.mk
index 04ceb64..1e2ded1 100644
--- a/py-smbus/Module.mk
+++ b/py-smbus/Module.mk
@@ -22,7 +22,7 @@ clean-python:
 	rm -rf py-smbus/build
 
 install-python:
-	$(DISTUTILS) install
+	$(DISTUTILS) install --prefix="$(PREFIX)"
 
 all: all-python
 
