diff --git a/install.sh b/install.sh
index 4630b211..4a09e22b 100755
--- a/install.sh
+++ b/install.sh
@@ -3,6 +3,12 @@
 BASH_IT=$(cd ${0%/*} && echo ${PWD})
 cd "${OLDPWD}"
 cp "${HOME}/.bash_profile" "${HOME}/.bash_profile.bak"
+BASH_PROFILE_BAK="${HOME}/.bash_profile.bak"
+if [ -f "${BASH_PROFILE_BAK}" ]; then
+  list=($(ls "${BASH_PROFILE_BAK}"*))
+  BASH_PROFILE_BAK="${BASH_PROFILE_BAK}.${#list[@]}"
+fi
+
 echo "Your original .bash_profile has been backed up to .bash_profile.bak"
 
 cp "${BASH_IT}/template/bash_profile.template.bash" "${HOME}/.bash_profile"