diff --git a/drivers/can/Kconfig.mcp251xfd b/drivers/can/Kconfig.mcp251xfd
index 8e6cb5ad91c..128becf8e95 100644
--- a/drivers/can/Kconfig.mcp251xfd
+++ b/drivers/can/Kconfig.mcp251xfd
@@ -54,7 +54,7 @@ config CAN_MCP251XFD_READ_CRC_RETRIES
 config CAN_MAX_FILTER
 	int "Maximum number of concurrent active filters"
 	default 5
-	range 1 31
+	range 1 32
 	help
 	  Maximum number of filters supported by the can_add_rx_callback() API call.
 
diff --git a/drivers/can/can_mcp251xfd.h b/drivers/can/can_mcp251xfd.h
index f0414103bed..b87c6ae53dd 100644
--- a/drivers/can/can_mcp251xfd.h
+++ b/drivers/can/can_mcp251xfd.h
@@ -496,7 +496,7 @@ struct mcp251xfd_data {
 	struct mcp251xfd_mailbox mailbox[CONFIG_CAN_MCP251XFD_MAX_TX_QUEUE];
 
 	/* Filter Data */
-	uint64_t filter_usage;
+	uint32_t filter_usage;
 	struct can_filter filter[CONFIG_CAN_MAX_FILTER];
 	can_rx_callback_t rx_cb[CONFIG_CAN_MAX_FILTER];
 	void *cb_arg[CONFIG_CAN_MAX_FILTER];