diff --git a/firmware/libc/include/string.h b/firmware/libc/include/string.h
index f4914ea..9346611 100644
--- a/firmware/libc/include/string.h
+++ b/firmware/libc/include/string.h
@@ -61,20 +61,6 @@
 int     _EXFUN(strtosigno, (const char *__name));
 #endif
 
-/* These function names are used on Windows and perhaps other systems.  */
-#ifndef strcmpi
-#define strcmpi strcasecmp
-#endif
-#ifndef stricmp
-#define stricmp strcasecmp
-#endif
-#ifndef strncmpi
-#define strncmpi strncasecmp
-#endif
-#ifndef strnicmp
-#define strnicmp strncasecmp
-#endif
-
 #endif /* ! __STRICT_ANSI__ */
 
 #ifdef __cplusplus