diff --git a/src/suggestion/getNodeSuggestions.ts b/src/suggestion/getNodeSuggestions.ts
index 40cffd0..dfa5a64 100644
--- a/src/suggestion/getNodeSuggestions.ts
+++ b/src/suggestion/getNodeSuggestions.ts
@@ -35,7 +35,6 @@ export const getNodeSuggestions = (
         ${functions?.map((_, i) => `const check${i}: TargetType = {} as F${i};`).join("\n")}
         `;
 
-
         const fileName = "index.ts";
         const host = createCompilerHost(fileName, sourceCode);
         const sourceFile = host.getSourceFile(fileName)!;
diff --git a/src/utils.ts b/src/utils.ts
index 143cfdf..950bfe7 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -46,6 +46,12 @@ export const MINIMAL_LIB = `
     interface NewableFunction extends Function {}
     interface IArguments { }
     interface RegExp { }
+  
+    declare namespace Utils {
+        type ReturnType<T extends (...args: any) => any> = T extends (...args: any) => infer R ? R : any;
+    }
+
+    import ReturnType = Utils.ReturnType;
 `;
 
 /**
diff --git a/test/nodeSuggestion.test.ts b/test/nodeSuggestion.test.ts
index 6058b0e..5254654 100644
--- a/test/nodeSuggestion.test.ts
+++ b/test/nodeSuggestion.test.ts
@@ -44,6 +44,10 @@ describe("getNodeSuggestions", () => {
             'std::control::value'
         ]))
 
+        expect(map).toEqual(expect.not.arrayContaining([
+            "std::number::add"
+        ]))
+
     });
 
     it("should suggest functions with compatible return types and prioritize exact matches for boolean", () => {