diff --git a/sdk/go/aws/iam/getPolicyDocument.go b/sdk/go/aws/iam/getPolicyDocument.go
index 985ae766864..84e9525f1c2 100644
--- a/sdk/go/aws/iam/getPolicyDocument.go
+++ b/sdk/go/aws/iam/getPolicyDocument.go
@@ -138,6 +138,12 @@ func GetPolicyDocumentOutput(ctx *pulumi.Context, args GetPolicyDocumentOutputAr
 		ApplyT(func(v interface{}) (GetPolicyDocumentResult, error) {
 			args := v.(GetPolicyDocumentArgs)
 			r, err := GetPolicyDocument(ctx, &args, opts...)
+			if err != nil {
+				return nil, err
+			}
+			if r == nil {
+				return nil, fmt.Errorf("expected either result or error to be nil, not both")
+			}
 			return *r, err
 		}).(GetPolicyDocumentResultOutput)
 }