diff --git a/data/engines.conf b/data/engines.conf
index d2168c5..99ca834 100644
--- a/data/engines.conf
+++ b/data/engines.conf
@@ -10,6 +10,7 @@ option-hard-0=hard
 
 [GNUchess]
 protocol=cecp
+binary=gnuchess
 args=--xboard
 option-easy-0=easy
 option-easy-1=depth 1