X-Git-Url: http://winboard.nl/cgi-bin?a=blobdiff_plain;f=backend.c;h=2b31182443efe757327a0a087dc121702f1ad7c6;hb=02498e4a3bd3313c9957b4435ea135341dd37290;hp=a4908e154bc3cd7b47eb2c4feaba691f4174fef5;hpb=6e187a501af90b3c34b543f7e38c18f425b96f28;p=xboard.git

diff --git a/backend.c b/backend.c
index a4908e1..2b31182 100644
--- a/backend.c
+++ b/backend.c
@@ -13702,7 +13702,7 @@ PositionToFEN(move, overrideCastling)
     *p++ = ' ';
 
   if(q = overrideCastling) { // [HGM] FRC: override castling & e.p fields for non-compliant engines
-    while(*p++ = *q++); if(q != overrideCastling+1) p[-1] = ' ';
+    while(*p++ = *q++); if(q != overrideCastling+1) p[-1] = ' '; else --p;
   } else {
   if(nrCastlingRights) {
      q = p;