diff --git a/src/backend/tcop/utility.c b/src/backend/tcop/utility.c
index f648945..6185863 100644
--- a/src/backend/tcop/utility.c
+++ b/src/backend/tcop/utility.c
@@ -2733,7 +2733,7 @@ GetCommandLogLevel(Node *parsetree)
 			break;
 
 		case T_AlterSystemStmt:
-			lev = LOGSTMT_ALL;
+			lev = LOGSTMT_DDL;
 			break;
 
 		case T_VariableSetStmt: