diff --git a/platform/win32/contiki-conf.h b/platform/win32/contiki-conf.h
index 1f95e31ee..fe1c1e1a2 100644
--- a/platform/win32/contiki-conf.h
+++ b/platform/win32/contiki-conf.h
@@ -21,7 +21,7 @@ int strcasecmp(const char*, const char*);
 char* strdup(const char*);
 #else
 #define strcasecmp _stricmp
-#define strdup _strdup
+#define strdup     _strdup
 #endif