diff --git a/maven-compat/src/main/java/org/apache/maven/artifact/Artifact.java b/maven-compat/src/main/java/org/apache/maven/artifact/Artifact.java
index 47b43170cc..b044fc3a28 100644
--- a/maven-compat/src/main/java/org/apache/maven/artifact/Artifact.java
+++ b/maven-compat/src/main/java/org/apache/maven/artifact/Artifact.java
@@ -33,7 +33,7 @@
 import org.apache.maven.artifact.versioning.VersionRange;
 
 public interface Artifact
-    extends Comparable
+    extends Comparable<Artifact>
 {
     String LATEST_VERSION = "LATEST";
 
diff --git a/maven-compat/src/main/java/org/apache/maven/artifact/DefaultArtifact.java b/maven-compat/src/main/java/org/apache/maven/artifact/DefaultArtifact.java
index 92bb74fd44..e28709477c 100644
--- a/maven-compat/src/main/java/org/apache/maven/artifact/DefaultArtifact.java
+++ b/maven-compat/src/main/java/org/apache/maven/artifact/DefaultArtifact.java
@@ -397,10 +397,8 @@ protected void setBaseVersionInternal( String baseVersion )
         }
     }
 
-    public int compareTo( Object o )
+    public int compareTo( Artifact a )
     {
-        Artifact a = (Artifact) o;
-
         int result = groupId.compareTo( a.getGroupId() );
         if ( result == 0 )
         {