diff --git a/README.md b/README.md
index 7595171..ff575b2 100644
--- a/README.md
+++ b/README.md
@@ -90,6 +90,15 @@ which are optional, but very cool.
 Then, restart zsh. 
 antigen will download and install all that's needed.
 
+# Disabling oh-my-git
+oh-my-git can be disabled on a per-repository basis. Just add a
+
+    [oh-my-git]
+    enabled = true
+
+in the `.git/config` file of a repo to revert to the original prompt for that particular repo. This could be handy when working with very huge repository, when the git commands invoked by oh-my-git can slow down the prompt.
+
+
 # Known bugs and limitations
 
 * git v1.8.4 or newer is required
diff --git a/base.sh b/base.sh
index 1c63fe4..2d14247 100644
--- a/base.sh
+++ b/base.sh
@@ -12,6 +12,12 @@ function enrich {
 }
 
 function build_prompt {
+    enabled=`git config --local --get oh-my-git.enabled`
+    if [[ ${enabled} == false ]]; then
+        echo "${PSORG}"
+        exit;
+    fi
+
     PS1=""    
     # Git info
     current_commit_hash=$(git rev-parse HEAD 2> /dev/null)
diff --git a/prompt.sh b/prompt.sh
index 748b04a..5547a5e 100644
--- a/prompt.sh
+++ b/prompt.sh
@@ -1,3 +1,4 @@
+PSORG=$PS1;
 if [ -n "${BASH_VERSION}" ]; then
     DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"