diff --git a/platform/esb/contiki-conf.h b/platform/esb/contiki-conf.h
index 732d9bb4f..8d8428c12 100644
--- a/platform/esb/contiki-conf.h
+++ b/platform/esb/contiki-conf.h
@@ -37,6 +37,9 @@ unsigned long clock_seconds(void);
 
 #define LOG_CONF_ENABLED 0
 
+/* Standard integer types. */
+#include <stdint.h>
+
 /**
  * The 8-bit unsigned data type.
  *