diff --git a/CHANGELOG.md b/CHANGELOG.md
index db1e578..f8e6532 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,6 +23,9 @@ Dropping a requirement of a major version of a dependency is a new contract.
 ## [Unreleased]
 [Unreleased]: https://github.com/atlassian-labs/aws-resources/compare/release-1.18.0...master
 
+### Fixed
+- Fix binary incompatibility of `Investment.copy` with the previous minor version.
+
 ## [1.18.0] - 2024-11-29
 [1.18.0]: https://github.com/atlassian-labs/aws-resources/compare/release-1.17.0...release-1.18.0
 
diff --git a/src/main/kotlin/com/atlassian/performance/tools/aws/api/Investment.kt b/src/main/kotlin/com/atlassian/performance/tools/aws/api/Investment.kt
index c7b4cc3..2c0f2ac 100644
--- a/src/main/kotlin/com/atlassian/performance/tools/aws/api/Investment.kt
+++ b/src/main/kotlin/com/atlassian/performance/tools/aws/api/Investment.kt
@@ -50,6 +50,24 @@ private constructor(
      */
     fun tag(): List<Tag> = tagAtlassianAwsAccountability() + tagLifecycle() + tagInitiator()
 
+    /**
+     * Added for backwards compatibility.
+     * TODO: To be removed in the next major version.
+     */
+    fun copy(
+        useCase: String = this.useCase,
+        lifespan: Duration = this.lifespan,
+        disposable: Boolean = this.disposable,
+        reuseKey: () -> String = this.reuseKey
+    ): Investment {
+        return Investment(
+            useCase = useCase,
+            lifespan = lifespan,
+            disposable = disposable,
+            reuseKey = reuseKey
+        )
+    }
+
     /**
      * @return tags required by all Atlassian AWS accounts
      */