diff --git a/core-java-modules/core-java-lang-oop-modifiers/src/main/java/com/baeldung/defaultstaticinterfacemethods/model/Car.java b/core-java-modules/core-java-lang-oop-modifiers/src/main/java/com/baeldung/defaultstaticinterfacemethods/model/Car.java
index 6ec6507e59..92dbec07e7 100644
--- a/core-java-modules/core-java-lang-oop-modifiers/src/main/java/com/baeldung/defaultstaticinterfacemethods/model/Car.java
+++ b/core-java-modules/core-java-lang-oop-modifiers/src/main/java/com/baeldung/defaultstaticinterfacemethods/model/Car.java
@@ -22,4 +22,9 @@ public class Car implements Vehicle {
     public String slowDown() {
         return "The car is slowing down.";
     }
+
+    @Override
+    public double getSpeed() {
+        return 0;
+    }
 }
\ No newline at end of file
diff --git a/core-java-modules/core-java-lang-oop-modifiers/src/main/java/com/baeldung/defaultstaticinterfacemethods/model/Motorbike.java b/core-java-modules/core-java-lang-oop-modifiers/src/main/java/com/baeldung/defaultstaticinterfacemethods/model/Motorbike.java
index b1de93059a..c3e17f63d5 100644
--- a/core-java-modules/core-java-lang-oop-modifiers/src/main/java/com/baeldung/defaultstaticinterfacemethods/model/Motorbike.java
+++ b/core-java-modules/core-java-lang-oop-modifiers/src/main/java/com/baeldung/defaultstaticinterfacemethods/model/Motorbike.java
@@ -22,4 +22,9 @@ public class Motorbike implements Vehicle {
     public String slowDown() {
         return "The motorbike is slowing down.";
     }
+
+    @Override
+    public double getSpeed() {
+        return 0;
+    }
 }
\ No newline at end of file
diff --git a/core-java-modules/core-java-lang-oop-modifiers/src/main/java/com/baeldung/defaultstaticinterfacemethods/model/MultiAlarmCar.java b/core-java-modules/core-java-lang-oop-modifiers/src/main/java/com/baeldung/defaultstaticinterfacemethods/model/MultiAlarmCar.java
index abf329fafd..85398ec488 100644
--- a/core-java-modules/core-java-lang-oop-modifiers/src/main/java/com/baeldung/defaultstaticinterfacemethods/model/MultiAlarmCar.java
+++ b/core-java-modules/core-java-lang-oop-modifiers/src/main/java/com/baeldung/defaultstaticinterfacemethods/model/MultiAlarmCar.java
@@ -32,4 +32,9 @@ public class MultiAlarmCar implements Vehicle, Alarm {
     public String turnAlarmOff() {
         return Vehicle.super.turnAlarmOff() + " " + Alarm.super.turnAlarmOff();
     }
+
+    @Override
+    public double getSpeed() {
+        return 0;
+    }
 }
\ No newline at end of file