diff --git a/injector/src/main/java/edu/ucr/cs/riple/injector/changes/AddMarkerAnnotation.java b/injector/src/main/java/edu/ucr/cs/riple/injector/changes/AddMarkerAnnotation.java
index b5e3cb72c..8005c907d 100644
--- a/injector/src/main/java/edu/ucr/cs/riple/injector/changes/AddMarkerAnnotation.java
+++ b/injector/src/main/java/edu/ucr/cs/riple/injector/changes/AddMarkerAnnotation.java
@@ -23,7 +23,6 @@
 package edu.ucr.cs.riple.injector.changes;
 
 import com.github.javaparser.Range;
-import com.github.javaparser.ast.NodeList;
 import com.github.javaparser.ast.expr.AnnotationExpr;
 import com.github.javaparser.ast.expr.MarkerAnnotationExpr;
 import com.github.javaparser.ast.nodeTypes.NodeWithAnnotations;
@@ -31,6 +30,7 @@
 import edu.ucr.cs.riple.injector.location.Location;
 import edu.ucr.cs.riple.injector.modifications.Insertion;
 import edu.ucr.cs.riple.injector.modifications.Modification;
+import edu.ucr.cs.riple.injector.util.TypeUtils;
 import java.util.Objects;
 import javax.annotation.Nullable;
 
@@ -53,13 +53,10 @@ Modification computeTextModificationOn(T node) {
       return null;
     }
     Range range = node.getRange().get();
-    NodeList<AnnotationExpr> annotations = node.getAnnotations();
     AnnotationExpr annotationExpr = new MarkerAnnotationExpr(annotationName.simpleName);
 
     // Check if annot already exists.
-    boolean annotAlreadyExists =
-        annotations.stream().anyMatch(annot -> annot.equals(annotationExpr));
-    if (annotAlreadyExists) {
+    if (TypeUtils.isAnnotatedWith(node, annotationExpr)) {
       return null;
     }
     return new Insertion(annotationExpr.toString(), range.begin);
diff --git a/injector/src/test/java/edu/ucr/cs/riple/injector/BasicTest.java b/injector/src/test/java/edu/ucr/cs/riple/injector/BasicTest.java
index 8d004b3e5..1bc6dce54 100644
--- a/injector/src/test/java/edu/ucr/cs/riple/injector/BasicTest.java
+++ b/injector/src/test/java/edu/ucr/cs/riple/injector/BasicTest.java
@@ -26,7 +26,9 @@
 
 import edu.ucr.cs.riple.injector.changes.ASTChange;
 import edu.ucr.cs.riple.injector.changes.AddMarkerAnnotation;
+import edu.ucr.cs.riple.injector.location.OnField;
 import edu.ucr.cs.riple.injector.location.OnMethod;
+import java.util.Collections;
 import org.junit.Test;
 
 public class BasicTest extends BaseInjectorTest {
@@ -89,4 +91,29 @@ public void skipExistingAnnotations() {
                 "javax.annotation.Nullable"))
         .start();
   }
+
+  @Test
+  public void ignoreCommentsOnAnnotationEqualCheckTest() {
+    injectorTestHelper
+        .addInput(
+            "Foo.java",
+            "package edu.ucr;",
+            "import javax.annotation.Nullable;",
+            "public class Test {",
+            "  @Nullable @GuardedBy(\"this\") // Either a RuntimeException, non-fatal Error, or IOException.",
+            "  private Throwable creationFailure;",
+            "}")
+        .expectOutput(
+            "package edu.ucr;",
+            "import javax.annotation.Nullable;",
+            "public class Test {",
+            "  @Nullable @GuardedBy(\"this\") // Either a RuntimeException, non-fatal Error, or IOException.",
+            "  private Throwable creationFailure;",
+            "}")
+        .addChanges(
+            new AddMarkerAnnotation(
+                new OnField("Foo.java", "edu.ucr.Test", Collections.singleton("creationFailure")),
+                "javax.annotation.Nullable"))
+        .start();
+  }
 }