diff --git a/sys/arm64/rockchip/clk/rk_clk_fract.c b/sys/arm64/rockchip/clk/rk_clk_fract.c
index 2b347db91790..17547b311eac 100644
--- a/sys/arm64/rockchip/clk/rk_clk_fract.c
+++ b/sys/arm64/rockchip/clk/rk_clk_fract.c
@@ -150,6 +150,8 @@ rk_clk_fract_init(struct clknode *clk, device_t dev)
 
 	sc->numerator  = (reg >> 16) & 0xFFFF;
 	sc->denominator  = reg & 0xFFFF;
+	if (sc->denominator == 0)
+		sc->denominator = 1;
 	clknode_init_parent_idx(clk, 0);
 
 	return(0);