diff --git a/src/types/predicates.ts b/src/types/predicates.ts
index b2731b6..164f82b 100644
--- a/src/types/predicates.ts
+++ b/src/types/predicates.ts
@@ -20,10 +20,7 @@ export type IsType<T, X> = X extends T ? True : False;
 export type IsArray<T> = T extends unknown[] ? True : False;
 export type IsNumber<T> = T extends number ? True : False;
 export type IsString<T> = T extends string ? True : False;
-export type IsFunction<T> =
-    Or<
-        T extends Function ? True : False,
-        T extends Function ? True : False>;
+export type IsFunction<T> = T extends Function ? True : False;
 
 export type IsStringFunction<T extends string> = And<IsString<T>, IsNever<T>>;
 export type IsBoolean<T> = T extends boolean ? True : False;