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diff --git a/parser.l b/parser.l
index 8e3d397..348bd15 100644
--- a/parser.l
+++ b/parser.l
@@ -1085,10 +1085,10 @@ int yywrap()
 
 /* Parse a move from the given string s */
 /* ^ at start of pattern WON'T work here unless using flex */
-ChessMove yylexstr(boardIndex, s)
-     int boardIndex;
-     char *s;
-{
+ChessMove yylexstr(boardIndex, s, text, len)
+     int boardIndex, len;
+     char *s, *text;
+{
     ChessMove ret;
     char *oldStringToLex;
 #ifdef FLEX_SCANNER
@@ -1104,7 +1104,9 @@ ChessMove yylexstr(boardIndex, s)
     yy_switch_to_buffer(buffer);
 #endif /*FLEX_SCANNER*/
 
-    ret = (ChessMove) yylex();
+    ret = (ChessMove) yylex();
+     strncpy(text, yy_text, len-1); // [HGM] vari: yy_text is not available to caller after buffer switch ?!?
+     text[len-1] = NULLCHAR;
 
 #ifdef FLEX_SCANNER
     if (oldBuffer != NULL)