diff --git a/xs/sources/xsSyntaxical.c b/xs/sources/xsSyntaxical.c
index 120beb2180..0c2f61988b 100644
--- a/xs/sources/xsSyntaxical.c
+++ b/xs/sources/xsSyntaxical.c
@@ -1377,6 +1377,7 @@ void fxDebuggerStatement(txParser* parser)
 void fxDoStatement(txParser* parser)
 {
 	txInteger aLine = parser->line;
+	fxCheckParserStack(parser, aLine);
 	fxPushNULL(parser);
 	fxMatchToken(parser, XS_TOKEN_DO);
 	fxStatement(parser, 0);