diff --git a/src/libstrongswan/utils/compat/windows.h b/src/libstrongswan/utils/compat/windows.h
index 7c6992300..1061708fc 100644
--- a/src/libstrongswan/utils/compat/windows.h
+++ b/src/libstrongswan/utils/compat/windows.h
@@ -134,16 +134,6 @@ const char WINAPI *inet_ntop(int af, const void *src, char *dst, socklen_t size)
 int WINAPI inet_pton(int af, const char *src, void *dst);
 #endif
 
-/**
- * Provided by printf hook backend
- */
-int asprintf(char **strp, const char *fmt, ...);
-
-/**
- * Provided by printf hook backend
- */
-int vasprintf(char **strp, const char *fmt, va_list ap);
-
 /**
  * timeradd(3) from <sys/time.h>
  */