diff --git a/firmware/target/arm/as3525/system-as3525.c b/firmware/target/arm/as3525/system-as3525.c
index b77f3dee9b..828ed2ef3e 100644
--- a/firmware/target/arm/as3525/system-as3525.c
+++ b/firmware/target/arm/as3525/system-as3525.c
@@ -330,9 +330,10 @@ void set_cpu_frequency(long frequency)
     {
         /* Increasing frequency so boost voltage before change */
         ascodec_write(AS3514_CVDD_DCDC3, (AS314_CP_DCDC3_SETTING | CVDD_1_20));
-        /* Confirm voltage is at least 1.20v before making fclk > 200 MHz */
-        ascodec_write(AS3514_ADC_0, 4<<4);            /* ADC Source = CVDD */
-        while (ascodec_read(AS3514_ADC_1) < 0xe0);    /* 0x1e0 *.0025 = 1.20  */
+        /* Wait for voltage to be at least 1.20v before making fclk > 200 MHz */
+        do
+            ascodec_write(AS3514_ADC_0, 4<<4);        /* ADC Input = CVDD */
+        while (ascodec_read(AS3514_ADC_1) < 0xe0);    /* 0x1e0 *.0025 = 1.20v */
                                                       /* e0 = 8LSB's of 0x1e0 */
         asm volatile(
             "mrc p15, 0, r0, c1, c0  \n"