diff --git a/source/code/Makefile b/source/code/Makefile
index 36d7934..e368034 100644
--- a/source/code/Makefile
+++ b/source/code/Makefile
@@ -47,7 +47,7 @@ OFILES=main.o highscore.o ReadKeyboard.o joypad.o listFiles.o replay.o common.o 
 
 ifeq ($(CROSS),i686-pc-mingw32-)
 OFILES += winicon.res
-BINARY+=.exe
+BINARY := $(BINARY).exe
 endif
 
 $(BINARY): 	$(OFILES)