diff --git a/libraries/mbed/hal/can_api.h b/libraries/mbed/hal/can_api.h
index bb90367cffb..48bc104695f 100644
--- a/libraries/mbed/hal/can_api.h
+++ b/libraries/mbed/hal/can_api.h
@@ -65,7 +65,7 @@ void          can_irq_set  (can_t *obj, CanIrqType irq, uint32_t enable);
 int           can_write    (can_t *obj, CAN_Message, int cc);
 int           can_read     (can_t *obj, CAN_Message *msg, int handle);
 int           can_mode     (can_t *obj, CanMode mode);
-int           can_filter   (can_t *obj, unsigned int id, unsigned int mask, CANFormat format, int handle);
+int           can_filter(can_t *obj, uint32_t id, uint32_t mask, CANFormat format, int32_t handle);
 void          can_reset    (can_t *obj);
 unsigned char can_rderror  (can_t *obj);
 unsigned char can_tderror  (can_t *obj);