diff --git a/README.md b/README.md
index fa5aba3..c6ff22b 100644
--- a/README.md
+++ b/README.md
@@ -85,7 +85,7 @@ Show differences between files in a two column view.
                         '--color-map=separator:white,description:cyan
 ```
 
-## Using with Git
+## Using with Git Diff
 
 To see what it looks like, try:
 
@@ -106,6 +106,23 @@ You can configure `git-icdiff` in Git's config:
 git config --global icdiff.options '--highlight --line-numbers'
 ```
 
+## Using with Git Show
+
+To see what it looks like, try:
+
+```sh
+GIT_EXTERNAL_DIFF=path/to/icdiff-git-extdiff git show --ext-diff
+```
+
+To install this as a tool you can use with Git, copy
+`git-icshow` and ``icdiff-git-extdiff into your PATH and run:
+
+```sh
+git icshow
+```
+
+It uses the same `icdiff.options` configuration used by `git-icdiff`.
+
 ## Using with subversion
 
 To try it out, run:
diff --git a/git-icshow b/git-icshow
new file mode 100755
index 0000000..89f5cd6
--- /dev/null
+++ b/git-icshow
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+GIT_EXTERNAL_DIFF=icdiff-git-extdiff git show --ext-diff
diff --git a/icdiff-git-extdiff b/icdiff-git-extdiff
new file mode 100755
index 0000000..753f4ff
--- /dev/null
+++ b/icdiff-git-extdiff
@@ -0,0 +1,6 @@
+#!/bin/sh
+set -e
+
+ICDIFF_OPTIONS=$(git config --get icdiff.options)
+
+sh -c "exec icdiff $ICDIFF_OPTIONS '$2' '$5'" || true