diff --git a/README.md b/README.md
index 071efa1..9e1ef37 100644
--- a/README.md
+++ b/README.md
@@ -49,8 +49,9 @@ module MyApp
       Rack::IdempotencyKey,
       store: Rack::IdempotencyKey::MemoryStore.new,
       routes: [
-        { path: "/posts",   method: "POST" },
-        { path: "/posts/*", method: "PATCH" }
+        { path: "/posts", method: "POST" },
+        { path: "/posts/*", method: "PATCH" },
+        { path: "/posts/*/comments", method: "POST" }
       ]
     )
   end
@@ -120,8 +121,9 @@ Each route entry must be compliant with what follows:
 
 ```ruby
 routes: [
-  { path: "/posts",   method: "POST" },
-  { path: "/posts/*", method: "PATCH" }
+  { path: "/posts", method: "POST" },
+  { path: "/posts/*", method: "PATCH" },
+  { path: "/posts/*/comments", method: "POST" }
 ]
 ```
 
diff --git a/lib/rack/idempotency_key/idempotent_request.rb b/lib/rack/idempotency_key/idempotent_request.rb
index 5705087..b4412d2 100644
--- a/lib/rack/idempotency_key/idempotent_request.rb
+++ b/lib/rack/idempotency_key/idempotent_request.rb
@@ -52,7 +52,8 @@ def idempotency_key
         attr_reader :request, :routes
 
         def matching_route?(route_path)
-          same_segments? segments(route_path)
+          route_segments = segments route_path
+          path_segments.size == route_segments.size && same_segments?(route_segments)
         end
 
         def matching_method?(route_method)
diff --git a/spec/rack/idempotency_key/idempotent_request_spec.rb b/spec/rack/idempotency_key/idempotent_request_spec.rb
index 63b66cf..cbda024 100644
--- a/spec/rack/idempotency_key/idempotent_request_spec.rb
+++ b/spec/rack/idempotency_key/idempotent_request_spec.rb
@@ -15,14 +15,18 @@
   let(:routes)          { [] }
   let(:idempotency_key) { "123456789" }
 
+  shared_context "with idempotency key in place" do
+    before { env["HTTP_IDEMPOTENCY_KEY"] = idempotency_key }
+  end
+
   describe "#allowed?" do
     context "with idempotency key over an allowed method and a matching route" do
+      include_context "with idempotency key in place"
+
       let(:env_opts) { { method: "POST" } }
       let(:env_uri)  { "/posts" }
       let(:routes)   { [{ path: "/posts", method: "POST" }] }
 
-      before { env["HTTP_IDEMPOTENCY_KEY"] = idempotency_key }
-
       it { is_expected.to be_allowed }
     end
 
@@ -35,6 +39,8 @@
     end
 
     context "with a not allowed request method" do
+      include_context "with idempotency key in place"
+
       let(:env_uri) { "/posts" }
       let(:routes)  { [{ path: "/posts", method: "GET" }] }
 
@@ -42,9 +48,11 @@
     end
 
     context "without a matching route" do
+      include_context "with idempotency key in place"
+
       let(:env_opts) { { method: "POST" } }
       let(:env_uri)  { "/posts/1/authors" }
-      let(:routes)   { [{ path: "/posts", method: "POST" }] }
+      let(:routes)   { [{ path: "/posts/*", method: "POST" }] }
 
       it { is_expected.not_to be_allowed }
     end
@@ -100,7 +108,7 @@
 
   describe "#idempotency_key?" do
     context "with the idempotency key" do
-      before { env["HTTP_IDEMPOTENCY_KEY"] = idempotency_key }
+      include_context "with idempotency key in place"
 
       it { is_expected.to be_idempotency_key }
     end
@@ -112,7 +120,7 @@
 
   describe "#idempotency_key" do
     context "with the idempotency key" do
-      before { env["HTTP_IDEMPOTENCY_KEY"] = idempotency_key }
+      include_context "with idempotency key in place"
 
       it { expect(idempotent_request.idempotency_key).to eq(idempotency_key) }
     end