diff --git a/platform/win32/contiki-conf.h b/platform/win32/contiki-conf.h
index 8a8d2cd01..1f95e31ee 100644
--- a/platform/win32/contiki-conf.h
+++ b/platform/win32/contiki-conf.h
@@ -18,8 +18,10 @@
 
 #ifdef __CYGWIN__
 int strcasecmp(const char*, const char*);
+char* strdup(const char*);
 #else
 #define strcasecmp _stricmp
+#define strdup _strdup
 #endif