diff --git a/components/esp_libc/priv_include/esp_time_impl.h b/components/esp_libc/priv_include/esp_time_impl.h
index 61c32dff199..8ed3f133a0f 100644
--- a/components/esp_libc/priv_include/esp_time_impl.h
+++ b/components/esp_libc/priv_include/esp_time_impl.h
@@ -5,6 +5,8 @@
  */
 #pragma once
 
+#include <stdint.h>
+
 uint64_t esp_time_impl_get_time(void);
 
 uint64_t esp_time_impl_get_time_since_boot(void);