diff --git a/libexec/pyenv b/libexec/pyenv
index 24d5210f..86521a7e 100755
--- a/libexec/pyenv
+++ b/libexec/pyenv
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 set -e
-export -n CDPATH
+unset CDPATH
 
 if [ "$1" = "--debug" ]; then
   export PYENV_DEBUG=1