diff --git a/src/backend/parser/parse_utilcmd.c b/src/backend/parser/parse_utilcmd.c
index a9ec161754..b128af6be0 100644
--- a/src/backend/parser/parse_utilcmd.c
+++ b/src/backend/parser/parse_utilcmd.c
@@ -408,6 +408,9 @@ generateSerialExtraStmts(CreateStmtContext *cxt, ColumnDef *column,
 	AlterSeqStmt *altseqstmt;
 	List	   *attnamelist;
 
+	/* Make a copy of this as we may end up modifying it in the code below */
+	seqoptions = list_copy(seqoptions);
+
 	/*
 	 * Determine namespace and name to use for the sequence.
 	 *