diff --git a/packages/@aws-cdk/aws-codepipeline-actions/lib/s3/source-action.ts b/packages/@aws-cdk/aws-codepipeline-actions/lib/s3/source-action.ts
index 9a825edd28762..2470ea6cca25f 100644
--- a/packages/@aws-cdk/aws-codepipeline-actions/lib/s3/source-action.ts
+++ b/packages/@aws-cdk/aws-codepipeline-actions/lib/s3/source-action.ts
@@ -134,7 +134,7 @@ export class S3SourceAction extends Action {
 
   private generateEventId(stage: codepipeline.IStage): string {
     let ret: string;
-    const baseId = Names.uniqueId(stage.pipeline) + 'SourceEventRule';
+    const baseId = Names.nodeUniqueId(stage.pipeline.node) + 'SourceEventRule';
 
     if (Token.isUnresolved(this.props.bucketKey)) {
       // If bucketKey is a Token, don't include it in the ID.