diff --git a/src/backend/distributed/utils/attribute.c b/src/backend/distributed/utils/attribute.c
index 4761aef02..dd0a95f13 100644
--- a/src/backend/distributed/utils/attribute.c
+++ b/src/backend/distributed/utils/attribute.c
@@ -630,6 +630,8 @@ ExtractTopComment(const char *inputString)
 
 	/* Skip the comment start characters */
 	commentEndCharsIndex += commentStartCharsLength;
+	
+	/* Find the first comment end character */
 	while (commentEndCharsIndex < inputStringLen &&
 		   !(inputString[commentEndCharsIndex] == '*' &&
 			 inputString [commentEndCharsIndex + 1] == '/'))