diff --git a/merlin-sdk/src/main/java/gov/nasa/jpl/aerie/merlin/protocol/types/Duration.java b/merlin-sdk/src/main/java/gov/nasa/jpl/aerie/merlin/protocol/types/Duration.java
index 712988c27c..e2ebc5e0de 100644
--- a/merlin-sdk/src/main/java/gov/nasa/jpl/aerie/merlin/protocol/types/Duration.java
+++ b/merlin-sdk/src/main/java/gov/nasa/jpl/aerie/merlin/protocol/types/Duration.java
@@ -650,4 +650,13 @@ public int compareTo(final Duration other) {
     return Long.compare(this.micros, other.micros);
   }
 
+  /**
+   * Delegates to `.equals(other)`.
+   *
+   * @deprecated use `.equals` instead.
+   */
+  @Deprecated
+  public boolean isEqualTo(final Object other) {
+    return this.equals(other);
+  }
 }