diff --git a/src/hci.c b/src/hci.c
index 65ac40bd4..8778ff1dc 100644
--- a/src/hci.c
+++ b/src/hci.c
@@ -694,13 +694,13 @@ bool hci_is_packet_buffer_reserved(void){
 }
 
 // reserves outgoing packet buffer. @returns 1 if successful
-int hci_reserve_packet_buffer(void){
+bool hci_reserve_packet_buffer(void){
     if (hci_stack->hci_packet_buffer_reserved) {
         log_error("hci_reserve_packet_buffer called but buffer already reserved");
-        return 0;
+        return false;
     }
     hci_stack->hci_packet_buffer_reserved = true;
-    return 1;    
+    return true;
 }
 
 void hci_release_packet_buffer(void){
diff --git a/src/hci.h b/src/hci.h
index 47fd7676a..94bffcdbd 100644
--- a/src/hci.h
+++ b/src/hci.h
@@ -1223,9 +1223,9 @@ int hci_send_sco_packet_buffer(int size);
 
 /**
  * Reserves outgoing packet buffer.
- * @return 1 on success
+ * @return true on success
  */
-int hci_reserve_packet_buffer(void);
+bool hci_reserve_packet_buffer(void);
 
 /**
  * Get pointer for outgoing packet buffer