diff --git a/baseline-error-prone/src/main/java/com/palantir/baseline/errorprone/CompileTimeConstantViolatesLiskovSubstitution.java b/baseline-error-prone/src/main/java/com/palantir/baseline/errorprone/CompileTimeConstantViolatesLiskovSubstitution.java
index 50e198136a..5d7180adc1 100644
--- a/baseline-error-prone/src/main/java/com/palantir/baseline/errorprone/CompileTimeConstantViolatesLiskovSubstitution.java
+++ b/baseline-error-prone/src/main/java/com/palantir/baseline/errorprone/CompileTimeConstantViolatesLiskovSubstitution.java
@@ -42,7 +42,8 @@
         severity = BugPattern.SeverityLevel.ERROR,
         summary = "@CompileTimeConstant annotations on method parameters must also be applied to the super method. "
                 + "Similarly, if a superclass or superinterface is annotated, implementations must also be annotated.")
-public class CompileTimeConstantViolatesLiskovSubstitution extends BugChecker implements BugChecker.MethodTreeMatcher {
+public final class CompileTimeConstantViolatesLiskovSubstitution extends BugChecker
+        implements BugChecker.MethodTreeMatcher {
 
     private static final Matcher<MethodTree> INEXPENSIVE_CHECK = Matchers.anyOf(
             Matchers.methodIsConstructor(),