diff --git a/sys/dev/extres/clk/clk.h b/sys/dev/extres/clk/clk.h
index 9bd259997977..4be9d3f12396 100644
--- a/sys/dev/extres/clk/clk.h
+++ b/sys/dev/extres/clk/clk.h
@@ -44,8 +44,12 @@
 #define	CLK_NODE_CANNOT_STOP	0x00000004	/* Clock cannot be disabled */
 
 /* Flags passed to clk_set_freq() and clknode_set_freq(). */
+#define	CLK_SET_ROUND(x)	((x) & (CLK_SET_ROUND_UP | CLK_SET_ROUND_DOWN))
+#define	CLK_SET_ROUND_EXACT	0
 #define	CLK_SET_ROUND_UP	0x00000001
 #define	CLK_SET_ROUND_DOWN	0x00000002
+#define	CLK_SET_ROUND_ANY	(CLK_SET_ROUND_UP | CLK_SET_ROUND_DOWN)
+
 #define	CLK_SET_USER_MASK	0x0000FFFF
 #define	CLK_SET_DRYRUN		0x00010000