diff --git a/.zshrc b/.zshrc
index ea93de4..d7d4cbc 100644
--- a/.zshrc
+++ b/.zshrc
@@ -47,8 +47,9 @@ bindkey "^[^[[A" up-line-or-beginning-search # Up
 bindkey "^[[B" down-line-or-beginning-search # Down
 bindkey "^[^[[B" down-line-or-beginning-search # Down
 
-zstyle ':completion:*:sudo::' environ PATH="/sbin:/usr/sbin:$PATH" HOME="/root"
+zstyle ':completion:*:sudo|_::' environ PATH="/sbin:/usr/sbin:$PATH" HOME="/root"
 zstyle ':completion:*' matcher-list '' 'm:{[:lower:][:upper:]}={[:upper:][:lower:]}' 'r:|[._-]=** r:|=**' 'l:|=* r:|=*'
+zstyle ':completion:*' rehash true
 zstyle :compinstall filename "$HOME/.zshrc"
 
 autoload -U compinit ; compinit