diff --git a/src/main/java/jenkins/scm/api/trait/SCMNavigatorTrait.java b/src/main/java/jenkins/scm/api/trait/SCMNavigatorTrait.java
index 6e3a0cef..03320fbc 100644
--- a/src/main/java/jenkins/scm/api/trait/SCMNavigatorTrait.java
+++ b/src/main/java/jenkins/scm/api/trait/SCMNavigatorTrait.java
@@ -39,7 +39,7 @@
  *
  * @since 2.2.0
  */
-public class SCMNavigatorTrait extends SCMTrait<SCMNavigatorTrait> {
+public abstract class SCMNavigatorTrait extends SCMTrait<SCMNavigatorTrait> {
 
     /**
      * Applies this trait to the {@link SCMNavigatorContext}.
diff --git a/src/main/java/jenkins/scm/api/trait/SCMSourceTrait.java b/src/main/java/jenkins/scm/api/trait/SCMSourceTrait.java
index 9b9ae492..0c53b3d2 100644
--- a/src/main/java/jenkins/scm/api/trait/SCMSourceTrait.java
+++ b/src/main/java/jenkins/scm/api/trait/SCMSourceTrait.java
@@ -39,7 +39,7 @@
  *
  * @since 2.2.0
  */
-public class SCMSourceTrait extends SCMTrait<SCMSourceTrait> {
+public abstract class SCMSourceTrait extends SCMTrait<SCMSourceTrait> {
 
     /**
      * Applies this trait to the {@link SCMSourceContext}.
diff --git a/src/main/java/jenkins/scm/api/trait/SCMTrait.java b/src/main/java/jenkins/scm/api/trait/SCMTrait.java
index cdc889a9..43f8e440 100644
--- a/src/main/java/jenkins/scm/api/trait/SCMTrait.java
+++ b/src/main/java/jenkins/scm/api/trait/SCMTrait.java
@@ -39,7 +39,7 @@
  *
  * @param <T> the type of {@link SCMTrait} specialization.
  */
-public class SCMTrait<T extends SCMTrait<T>> extends AbstractDescribableImpl<T> {
+public abstract class SCMTrait<T extends SCMTrait<T>> extends AbstractDescribableImpl<T> {
     /**
      * {@inheritDoc}
      */