diff --git a/platform/win32/contiki-conf.h b/platform/win32/contiki-conf.h
index 56c01c4af..8a8d2cd01 100644
--- a/platform/win32/contiki-conf.h
+++ b/platform/win32/contiki-conf.h
@@ -16,7 +16,9 @@
 
 
 
-#ifdef _MSC_VER
+#ifdef __CYGWIN__
+int strcasecmp(const char*, const char*);
+#else
 #define strcasecmp _stricmp
 #endif