diff --git a/examples/include-if-exists/docs/empty.md b/examples/include-if-exists/docs/empty.md
new file mode 100644
index 0000000..e69de29
diff --git a/examples/include-if-exists/docs/included.md b/examples/include-if-exists/docs/included.md
new file mode 100644
index 0000000..333a243
--- /dev/null
+++ b/examples/include-if-exists/docs/included.md
@@ -0,0 +1 @@
+Some included content.
diff --git a/examples/include-if-exists/docs/index.md b/examples/include-if-exists/docs/index.md
new file mode 100644
index 0000000..f4be21f
--- /dev/null
+++ b/examples/include-if-exists/docs/index.md
@@ -0,0 +1,5 @@
+<!-- Only include 'included.md' if exists. Always include 'empty.md'. -->
+
+{% include-markdown '?(empty.md)?(included.md)' %}
+
+{% include-markdown '?(empty.md)?(not-existent.md)' %}
diff --git a/examples/include-if-exists/mkdocs.yml b/examples/include-if-exists/mkdocs.yml
new file mode 100644
index 0000000..0f97266
--- /dev/null
+++ b/examples/include-if-exists/mkdocs.yml
@@ -0,0 +1,3 @@
+site_name: Foo
+plugins:
+  - include-markdown