diff --git a/src/backend/distributed/utils/attribute.c b/src/backend/distributed/utils/attribute.c
index b63f3ae85..35fd67333 100644
--- a/src/backend/distributed/utils/attribute.c
+++ b/src/backend/distributed/utils/attribute.c
@@ -745,7 +745,7 @@ Substring(const char *str, int start, int end)
 	/* Copy the substring to the new memory location */
 	strncpy_s(substr, end - start + 1, str + start, end - start);
 
-	/* Add null terminator to end the substring */
+	/* Add null terminator to end of the substring */
 	substr[end - start] = '\0';
 
 	return substr;