diff --git a/packages/python/web/TwistedConch/meta b/packages/python/web/TwistedConch/meta
index e122c9c524..92710e119c 100644
--- a/packages/python/web/TwistedConch/meta
+++ b/packages/python/web/TwistedConch/meta
@@ -25,7 +25,7 @@ PKG_ARCH="any"
 PKG_LICENSE="MIT"
 PKG_SITE="http://twistedmatrix.com/"
 PKG_URL="http://twistedmatrix.com/Releases/Conch/11.0/$PKG_NAME-$PKG_VERSION.tar.bz2"
-PKG_DEPENDS="Python distribute TwistedCore"
+PKG_DEPENDS="Python distribute TwistedCore pyasn1"
 PKG_BUILD_DEPENDS="toolchain Python distribute distutilscross TwistedCore"
 PKG_PRIORITY="optional"
 PKG_SECTION="python/web"