diff --git a/src/lib/validation/documentation.ts b/src/lib/validation/documentation.ts
index da9df9db4..d57feafd1 100644
--- a/src/lib/validation/documentation.ts
+++ b/src/lib/validation/documentation.ts
@@ -100,7 +100,13 @@ export function validateDocumentation(
 
         const symbolId = project.getSymbolIdFromReflection(ref);
 
-        if (!ref.hasComment() && symbolId) {
+        // #2644, signatures may be documented by their parent reflection.
+        const hasComment =
+            ref.hasComment() ||
+            (ref.kindOf(ReflectionKind.SomeSignature) &&
+                ref.parent?.hasComment());
+
+        if (!hasComment && symbolId) {
             if (symbolId.fileName.includes("node_modules")) {
                 continue;
             }
diff --git a/src/test/converter2/issues/gh2644.ts b/src/test/converter2/issues/gh2644.ts
new file mode 100644
index 000000000..a802fe388
--- /dev/null
+++ b/src/test/converter2/issues/gh2644.ts
@@ -0,0 +1,7 @@
+/**
+ * Lambda docs
+ * @param value - Value.
+ */
+export const voidLambda = (value: unknown): void => {
+    // ...
+};
diff --git a/src/test/issues.c2.test.ts b/src/test/issues.c2.test.ts
index 97162d2c8..8ec277621 100644
--- a/src/test/issues.c2.test.ts
+++ b/src/test/issues.c2.test.ts
@@ -1663,4 +1663,11 @@ describe("Issue Tests", () => {
             [[]],
         );
     });
+
+    it("#2644 allows comments on signature parents to count for being documented", () => {
+        app.options.setValue("validation", { notDocumented: true });
+        const project = convert();
+        app.validate(project);
+        logger.expectNoOtherMessages();
+    });
 });