diff --git a/dev-python/os-ken/os-ken-2.3.1.ebuild b/dev-python/os-ken/os-ken-2.3.1.ebuild
index 47de5dbde0..275d700133 100644
--- a/dev-python/os-ken/os-ken-2.3.1.ebuild
+++ b/dev-python/os-ken/os-ken-2.3.1.ebuild
@@ -47,7 +47,7 @@ BDEPEND="
 
 distutils_enable_tests nose
 
-source_prepare() {
+src_prepare() {
 	rm -r os-ken/os-ken/tests/integrated || die
 	default
 }