diff --git a/lib/plugins/aws/deploy/compile/events/stream/index.js b/lib/plugins/aws/deploy/compile/events/stream/index.js
index 07284e90f..bbbb278a5 100644
--- a/lib/plugins/aws/deploy/compile/events/stream/index.js
+++ b/lib/plugins/aws/deploy/compile/events/stream/index.js
@@ -113,20 +113,23 @@ class AwsCompileStreamEvents {
               };
             }
 
-            // update the PolicyDocument statements
-            const statement = this.serverless.service.provider.compiledCloudFormationTemplate
-              .Resources
-              .IamPolicyLambdaExecution
-              .Properties
-              .PolicyDocument
-              .Statement;
+            // update the PolicyDocument statements (if default policy is used)
+            if (this.serverless.service.provider.compiledCloudFormationTemplate
+              .Resources.IamPolicyLambdaExecution) {
+              const statement = this.serverless.service.provider.compiledCloudFormationTemplate
+                .Resources
+                .IamPolicyLambdaExecution
+                .Properties
+                .PolicyDocument
+                .Statement;
 
-            this.serverless.service.provider.compiledCloudFormationTemplate
-              .Resources
-              .IamPolicyLambdaExecution
-              .Properties
-              .PolicyDocument
-              .Statement = statement.concat([streamStatement]);
+              this.serverless.service.provider.compiledCloudFormationTemplate
+                .Resources
+                .IamPolicyLambdaExecution
+                .Properties
+                .PolicyDocument
+                .Statement = statement.concat([streamStatement]);
+            }
 
             const newStreamObject = {
               [`${normalizedFunctionName}EventSourceMapping${