diff --git a/data/supported-extensions b/data/supported-extensions
index 1e5d9c6..fc1aca4 100644
--- a/data/supported-extensions
+++ b/data/supported-extensions
@@ -52,6 +52,7 @@ lzf 5.5 5.6 7.0 7.1 7.2 7.3 7.4 8.0 8.1 8.2 8.3 8.4
 mailparse 5.5 5.6 7.0 7.1 7.2 7.3 7.4 8.0 8.1 8.2 8.3 8.4
 maxminddb 7.2 7.3 7.4 8.0 8.1 8.2 8.3 8.4
 mcrypt 5.5 5.6 7.0 7.1 7.2 7.3 7.4 8.0 8.1 8.2 8.3
+md4c 8.0 8.1 8.2 8.3 8.4
 memcache 5.5 5.6 7.0 7.1 7.2 7.3 7.4 8.0 8.1 8.2 8.3 8.4
 memcached 5.5 5.6 7.0 7.1 7.2 7.3 7.4 8.0 8.1 8.2 8.3 8.4
 memprof 5.5 5.6 7.0 7.1 7.2 7.3 7.4 8.0 8.1 8.2 8.3 8.4
diff --git a/scripts/tests/md4c b/scripts/tests/md4c
new file mode 100755
index 0000000..42b45cd
--- /dev/null
+++ b/scripts/tests/md4c
@@ -0,0 +1,27 @@
+#!/usr/bin/env php
+<?php
+
+require_once __DIR__ . '/_bootstrap.php';
+
+if (!function_exists('md4c_toHtml')) {
+    fwrite(STDERR, "The function md4c_toHtml() does not exist\n");
+    exit(1);
+}
+
+$input = "# Test\n";
+$expected = "<h1>Test</h1>\n";
+$actual = md4c_toHtml($input);
+
+if ($actual !== $expected) {
+    fwrite(
+        STDERR,
+        <<<EOT
+Failed to convert {$input}
+Expected: {$expected}
+Actual  : {$actual}
+
+EOT
+    );
+    exit(1);
+}
+echo "md4c_toHtml() works just fine.\n";