diff --git a/zsh/aliases b/zsh/aliases
index 6b82e6be..a4e84a25 100644
--- a/zsh/aliases
+++ b/zsh/aliases
@@ -70,7 +70,7 @@ alias gs='git status'
 alias gco='git checkout'
 alias gc='git commit'
 alias gcm='noglob git commit -m'
-alias gc='git diff'
+alias gd='git diff'
 alias gp='git push'
 alias gl='git pull'
 alias ga='git add'
diff --git a/zsh/preztorc b/zsh/preztorc
index 6a396ef1..ca52ea55 100644
--- a/zsh/preztorc
+++ b/zsh/preztorc
@@ -98,13 +98,6 @@ zstyle ':prezto:module:syntax-highlighting' highlighters \
   'pattern' \
   'cursor' \
   'root'
-#
-# Set syntax highlighting styles.
-# zstyle ':prezto:module:syntax-highlighting' styles \
-#   'builtin' 'bg=blue' \
-#   'command' 'bg=blue' \
-#   'function' 'bg=blue'
-
 
 # Terminal
 
@@ -116,12 +109,3 @@ zstyle ':prezto:module:terminal' auto-title 'yes'
 
 # Set the tab title format.
 # zstyle ':prezto:module:terminal:tab-title' format '%m: %s'
-
-
-# Tmux
-
-# Auto start a session when Zsh is launched in a local terminal.
-#zstyle ':prezto:module:tmux:auto-start' local 'yes'
-
-# Auto start a session when Zsh is launched in a SSH connection.
-#zstyle ':prezto:module:tmux:auto-start' remote 'yes'