diff --git a/sys/dev/uart/uart_bus_fdt.c b/sys/dev/uart/uart_bus_fdt.c
index 7725d09e212..431f2962adb 100644
--- a/sys/dev/uart/uart_bus_fdt.c
+++ b/sys/dev/uart/uart_bus_fdt.c
@@ -234,7 +234,8 @@ uart_cpu_fdt_probe(struct uart_class **classp, bus_space_tag_t *bst,
 		    (struct uart_class *)uart_fdt_find_by_node(node, 1);
 		if (class == NULL)
 			return (ENXIO);
-		clk = 0;
+		if (uart_fdt_get_clock(node, &clk) != 0)
+			clk = 0;
 	}
 
 	/*