diff --git a/include/espmissingincludes.h b/include/espmissingincludes.h
index 2f12772..0fff213 100644
--- a/include/espmissingincludes.h
+++ b/include/espmissingincludes.h
@@ -27,8 +27,10 @@ char *ets_strstr(const char *haystack, const char *needle);
 void ets_timer_arm_new(ETSTimer *a, int b, int c, int isMstimer);
 void ets_timer_disarm(ETSTimer *a);
 void ets_timer_setfn(ETSTimer *t, ETSTimerFunc *fn, void *parg);
+void ets_update_cpu_frequency(int freqmhz);
 int os_printf(const char *format, ...)  __attribute__ ((format (printf, 1, 2)));
 int os_snprintf(char *str, size_t size, const char *format, ...) __attribute__ ((format (printf, 3, 4)));
+int os_printf_plus(const char *format, ...)  __attribute__ ((format (printf, 1, 2)));
 void pvPortFree(void *ptr);
 void *pvPortMalloc(size_t xWantedSize);
 void *pvPortZalloc(size_t);
@@ -40,4 +42,5 @@ uint32 system_get_time();
 int os_random();
 int rand(void);
 void ets_bzero(void *s, size_t n);
+void ets_delay_us(int ms);
 #endif