diff --git a/drivers/cpufreq/pmac32-cpufreq.c b/drivers/cpufreq/pmac32-cpufreq.c
index 4b8ee2014da6..7ec6d1bb4592 100644
--- a/drivers/cpufreq/pmac32-cpufreq.c
+++ b/drivers/cpufreq/pmac32-cpufreq.c
@@ -546,7 +546,7 @@ static int pmac_cpufreq_init_7447A(struct device_node *cpunode)
 {
 	struct device_node *volt_gpio_np;
 
-	if (of_get_property(cpunode, "dynamic-power-step", NULL) == NULL)
+	if (!of_property_read_bool(cpunode, "dynamic-power-step"))
 		return 1;
 
 	volt_gpio_np = of_find_node_by_name(NULL, "cpu-vcore-select");
@@ -576,7 +576,7 @@ static int pmac_cpufreq_init_750FX(struct device_node *cpunode)
 	u32 pvr;
 	const u32 *value;
 
-	if (of_get_property(cpunode, "dynamic-power-step", NULL) == NULL)
+	if (!of_property_read_bool(cpunode, "dynamic-power-step"))
 		return 1;
 
 	hi_freq = cur_freq;
@@ -632,7 +632,7 @@ static int __init pmac_cpufreq_setup(void)
 
 	/*  Check for 7447A based MacRISC3 */
 	if (of_machine_is_compatible("MacRISC3") &&
-	    of_get_property(cpunode, "dynamic-power-step", NULL) &&
+	    of_property_read_bool(cpunode, "dynamic-power-step") &&
 	    PVR_VER(mfspr(SPRN_PVR)) == 0x8003) {
 		pmac_cpufreq_init_7447A(cpunode);