diff --git a/README.md b/README.md
index 063a28d..3910950 100644
--- a/README.md
+++ b/README.md
@@ -64,6 +64,7 @@ The user ip is determined by the following order:
 10. `req.socket.remoteAddress`
 11. `req.connection.socket.remoteAddress`
 12. `req.info.remoteAddress`
+13. `request.raw` (Fastify)
 
 If an IP address cannot be found, it will return `null`.
 
diff --git a/src/index.js b/src/index.js
index 52e426a..a9b4316 100644
--- a/src/index.js
+++ b/src/index.js
@@ -119,6 +119,7 @@ function getClientIp(req) {
     }
 
     // Remote address checks.
+    // Deprecated
     if (is.existy(req.connection)) {
         if (is.ip(req.connection.remoteAddress)) {
             return req.connection.remoteAddress;
@@ -141,6 +142,11 @@ function getClientIp(req) {
         return req.requestContext.identity.sourceIp;
     }
 
+    // Fastify https://www.fastify.io/docs/latest/Reference/Request/
+    if (is.existy(req.raw)) {
+        return getClientIp(req.raw);
+    }
+
     return null;
 }
 
diff --git a/test/index.js b/test/index.js
index 693d6fd..6303ea6 100644
--- a/test/index.js
+++ b/test/index.js
@@ -544,3 +544,23 @@ test('request to Google Cloud App Engine (x-appengine-user-ip)', (t) => {
         });
     });
 });
+
+test('Fastify (request.raw) found', (t) => {
+    t.plan(1);
+    const found = requestIp.getClientIp({
+        raw: {
+            headers: {
+                forwarded: '91.203.163.199',
+            },
+        },
+    });
+    t.equal(found, '91.203.163.199');
+});
+
+test('Fastify (request.raw) not found', (t) => {
+    t.plan(1);
+    const found = requestIp.getClientIp({
+        raw: {},
+    });
+    t.equal(found, null);
+});