diff --git a/src/04-generics-advanced/17.5-inference-inside-generic-functions.solution.ts b/src/04-generics-advanced/17.5-inference-inside-generic-functions.solution.1.ts
similarity index 100%
rename from src/04-generics-advanced/17.5-inference-inside-generic-functions.solution.ts
rename to src/04-generics-advanced/17.5-inference-inside-generic-functions.solution.1.ts
diff --git a/src/04-generics-advanced/17.5-inference-inside-generic-functions.solution.2.ts b/src/04-generics-advanced/17.5-inference-inside-generic-functions.solution.2.ts
new file mode 100644
index 0000000..dc3a7fd
--- /dev/null
+++ b/src/04-generics-advanced/17.5-inference-inside-generic-functions.solution.2.ts
@@ -0,0 +1,16 @@
+type Person = {
+  name: string;
+  age: number;
+  birthdate: Date;
+};
+
+export function remapPerson<Key extends keyof Person>(
+  key: Key,
+  value: Person[Key],
+): Person[keyof Person] {
+  if (key === "birthdate") {
+    return new Date();
+  }
+
+  return value;
+}
\ No newline at end of file