diff --git a/.bash_aliases b/.bash_aliases
index 14467de..9046246 100644
--- a/.bash_aliases
+++ b/.bash_aliases
@@ -1,6 +1,6 @@
 alias sudo='sudo '
 
-if [ "$OSTYPE" == "FreeBSD" ]; then
+if [ "$OS_TYPE" == "freebsd" ]; then
     alias ls='ls -G'
 else
     alias ls='ls --color=auto'
diff --git a/.bashrc b/.bashrc
index 37e0643..8208cfe 100644
--- a/.bashrc
+++ b/.bashrc
@@ -22,8 +22,11 @@ if [ -d "$HOME/.gem/ruby/2.0.0/bin" ]; then
     export PATH="$PATH:$HOME/.gem/ruby/2.0.0/bin"
 fi
 
+# OS
+OS_TYPE=$(echo "$OSTYPE" | sed 's/\([a-zA-Z_\-]*\).*/\1/g')
+
 # Colors
-if [ "$OSTYPE" != "FreeBSD" ]; then
+if [ "$OS_TYPE" != "freebsd" ]; then
     eval $(dircolors -b)
 fi