diff --git a/simulator/Makefile b/simulator/Makefile
index 5a59bf7..2dff737 100644
--- a/simulator/Makefile
+++ b/simulator/Makefile
@@ -4,7 +4,7 @@ TOPDIR = ..
 include $(TOPDIR)/defaults.mk
 
 ifeq ($(OSTYPE),cygwin)  
-	SRC_SIM = winmain.c trackball.c eeprom.c
+	SRC_SIM = winmain.c eeprom.c
 else
 	SRC_SIM = main.c trackball.c eeprom.c
 endif