diff --git a/Core/Src/canlog.c b/Core/Src/canlog.c
index 8efc726..b9ccf76 100644
--- a/Core/Src/canlog.c
+++ b/Core/Src/canlog.c
@@ -2,6 +2,9 @@
 #include "cmsis_os.h"
 #include <string.h>
 
+extern CAN_HandleTypeDef hcan1;
+extern CAN_HandleTypeDef hcan2;
+
 /* Definitions for canBus1Listen */
 osThreadId_t canBus1ListenHandle;
 const osThreadAttr_t canBus1Listen_attributes = {