diff --git a/cpu/mc1322x/Makefile.mc1322x b/cpu/mc1322x/Makefile.mc1322x
index 316012133..676986d34 100644
--- a/cpu/mc1322x/Makefile.mc1322x
+++ b/cpu/mc1322x/Makefile.mc1322x
@@ -72,8 +72,8 @@ CUSTOM_RULE_C_TO_O=yes
 CFLAGS += -I$(OBJECTDIR) -I$(CONTIKI_CPU)/board -DBOARD=$(TARGET)
 
 $(OBJECTDIR)/board.h: $(OBJECTDIR) 
-ifneq (,$(findstring cygdrive,$(shell pwd)))
-${info Cygwin detected.}
+ifneq (,$(findstring Windows,$(OS)))
+	${info Cygwin detected.}
 	ln -f $(CONTIKI_CPU)/board/$(TARGET).h $(OBJECTDIR)/board.h
 else
 	ln -sf ../$(CONTIKI_CPU)/board/$(TARGET).h $(OBJECTDIR)/board.h