diff --git a/bin/pyenv-virtualenv-init b/bin/pyenv-virtualenv-init
index a24a785..e12769a 100755
--- a/bin/pyenv-virtualenv-init
+++ b/bin/pyenv-virtualenv-init
@@ -45,6 +45,7 @@ if [ -z "$shell" ]; then
   shell="${shell%% *}"
   shell="${shell:-$SHELL}"
   shell="${shell##*/}"
+  shell="${shell%%-*}"
 fi
 
 if [ -z "$print" ]; then