diff --git a/gems/aws-sdk-s3/lib/aws-sdk-s3/presigned_post.rb b/gems/aws-sdk-s3/lib/aws-sdk-s3/presigned_post.rb
index 8d1d940268b..1a3d3f0eec7 100644
--- a/gems/aws-sdk-s3/lib/aws-sdk-s3/presigned_post.rb
+++ b/gems/aws-sdk-s3/lib/aws-sdk-s3/presigned_post.rb
@@ -98,7 +98,7 @@ module S3
     # or call the associated method.
     #
     # ```ruby
-    # post = Aws::S3::PresignedPost.new(creds, region, bucket).
+    # post = Aws::S3::PresignedPost.new(creds, region, bucket)
     # post.content_type('text/plain')
     # ```
     #
@@ -211,7 +211,7 @@ class PresignedPost
       #   See {PresignedPost#content_encoding}.
       # @option options [String] :content_encoding_starts_with
       #   See {PresignedPost#content_encoding_starts_with}.
-      # @option options [String] :expires See {PresignedPost#expires}.
+      # @option options [Time] :expires See {PresignedPost#expires}.
       # @option options [String] :expires_starts_with
       #   See {PresignedPost#expires_starts_with}.
       # @option options [Range<Integer>] :content_length_range