diff --git a/lib/plugins/aws/package/compile/events/kafka.js b/lib/plugins/aws/package/compile/events/kafka.js
index 54a2f85b2c98..1d381796bdae 100644
--- a/lib/plugins/aws/package/compile/events/kafka.js
+++ b/lib/plugins/aws/package/compile/events/kafka.js
@@ -88,7 +88,6 @@ class AwsCompileKafkaEvents {
         },
         startingPositionTimestamp: {
           type: 'number',
-          minimum: 0,
         },
         topic: {
           type: 'string',
@@ -157,7 +156,7 @@ class AwsCompileKafkaEvents {
 
         if (startingPosition === 'AT_TIMESTAMP' && !startingPositionTimestamp) {
           throw new ServerlessError(
-            `You must specify startingPositionTimestamp for function: ${functionName} when startingPosition is AT_TIMESTAMP`,
+            `You must specify startingPositionTimestamp for function: ${functionName} when startingPosition is AT_TIMESTAMP.`,
             'FUNCTION_KAFKA_STARTING_POSITION_TIMESTAMP_INVALID'
           );
         }