diff --git a/jOOQ/src/main/java/org/jooq/Function1.java b/jOOQ/src/main/java/org/jooq/Function1.java
index 66fa7962e0..0b1824b915 100644
--- a/jOOQ/src/main/java/org/jooq/Function1.java
+++ b/jOOQ/src/main/java/org/jooq/Function1.java
@@ -37,6 +37,8 @@
  */
 package org.jooq;
 
+import java.util.function.Function;
+
 /**
  * A function of degree 1.
  * <p>
@@ -47,10 +49,11 @@ package org.jooq;
  */
 @Internal
 @FunctionalInterface
-public interface Function1<T1, R> {
+public interface Function1<T1, R> extends Function<T1, R> {
 
     /**
      * Applies this function to the given arguments.
      */
+    @Override
     R apply(T1 t1);
 }
diff --git a/jOOQ/src/main/java/org/jooq/Function2.java b/jOOQ/src/main/java/org/jooq/Function2.java
index 6883bdad58..df098e9c10 100644
--- a/jOOQ/src/main/java/org/jooq/Function2.java
+++ b/jOOQ/src/main/java/org/jooq/Function2.java
@@ -37,6 +37,8 @@
  */
 package org.jooq;
 
+import java.util.function.BiFunction;
+
 /**
  * A function of degree 2.
  * <p>
@@ -47,10 +49,11 @@ package org.jooq;
  */
 @Internal
 @FunctionalInterface
-public interface Function2<T1, T2, R> {
+public interface Function2<T1, T2, R> extends BiFunction<T1, T2, R> {
 
     /**
      * Applies this function to the given arguments.
      */
+    @Override
     R apply(T1 t1, T2 t2);
 }