diff --git a/core-java-modules/core-java-reflection-2/src/main/java/com/baeldung/reflection/proxy/AdvancedOperation.java b/core-java-modules/core-java-reflection-2/src/main/java/com/baeldung/reflection/proxy/AdvancedOperation.java
index 3262b255f0..b3f0dc8ec0 100644
--- a/core-java-modules/core-java-reflection-2/src/main/java/com/baeldung/reflection/proxy/AdvancedOperation.java
+++ b/core-java-modules/core-java-reflection-2/src/main/java/com/baeldung/reflection/proxy/AdvancedOperation.java
@@ -1,7 +1,7 @@
 package com.baeldung.reflection.proxy;
 
 public interface AdvancedOperation {
-    int multiple(int a, int b);
+    int multiply(int a, int b);
 
     int divide(int a, int b);
 }
\ No newline at end of file
diff --git a/core-java-modules/core-java-reflection-2/src/main/java/com/baeldung/reflection/proxy/BasicOperation.java b/core-java-modules/core-java-reflection-2/src/main/java/com/baeldung/reflection/proxy/BasicOperation.java
index b39eb0118e..168367b690 100644
--- a/core-java-modules/core-java-reflection-2/src/main/java/com/baeldung/reflection/proxy/BasicOperation.java
+++ b/core-java-modules/core-java-reflection-2/src/main/java/com/baeldung/reflection/proxy/BasicOperation.java
@@ -3,5 +3,5 @@ package com.baeldung.reflection.proxy;
 public interface BasicOperation {
     int add(int a, int b);
 
-    int sub(int a, int b);
+    int subtract(int a, int b);
 }
\ No newline at end of file