diff --git a/subsys/bluetooth/controller/hal/cntr.h b/subsys/bluetooth/controller/hal/cntr.h
index 6b4303e..39862c1 100644
--- a/subsys/bluetooth/controller/hal/cntr.h
+++ b/subsys/bluetooth/controller/hal/cntr.h
@@ -4,6 +4,7 @@
  *
  * SPDX-License-Identifier: Apache-2.0
  */
+#include <stdint.h>
 
 void cntr_init(void);
 uint32_t cntr_start(void);