diff --git a/firmware/blinky_SPIFI_SRAM/blinky.c b/firmware/blinky_SPIFI_SRAM/blinky.c
index 7fa09249..0b3f5887 100644
--- a/firmware/blinky_SPIFI_SRAM/blinky.c
+++ b/firmware/blinky_SPIFI_SRAM/blinky.c
@@ -19,6 +19,8 @@
  * Boston, MA 02110-1301, USA.
  */
 
+#include <stdint.h>
+
 #include "hackrf_core.h"
 
 void wait(uint8_t duration)