diff --git a/src/backend/distributed/utils/attribute.c b/src/backend/distributed/utils/attribute.c
index aa04aebc6..ae77ed792 100644
--- a/src/backend/distributed/utils/attribute.c
+++ b/src/backend/distributed/utils/attribute.c
@@ -690,7 +690,7 @@ extractTopComment(const char *inputString)
 
 	if (i > 2)
 	{
-		char *result = (char *) malloc(sizeof(char) * (i - 1));
+		char *result = (char *) palloc(sizeof(char) * (i - 1));
 		strncpy(result, inputString + 2, i - 2);
 		return result;
 	}