diff --git a/firmware/export/config/xduoox3.h b/firmware/export/config/xduoox3.h
index 7efeaf3b2f..cb825737ba 100644
--- a/firmware/export/config/xduoox3.h
+++ b/firmware/export/config/xduoox3.h
@@ -148,7 +148,7 @@
 #define CONFIG_CPU JZ4760B
 
 /* Define this to the CPU frequency */
-#define CPU_FREQ 492000000    /* CPU clock: 492 MHz */
+#define CPU_FREQ 480000000    /* CPU clock: 480 MHz -- Keep a multiple of 48MHz! */
 
 /* Define this if you want to use the JZ47XX i2c interface */
 #define CONFIG_I2C I2C_JZ47XX
diff --git a/firmware/target/mips/ingenic_jz47xx/system-jz4760.c b/firmware/target/mips/ingenic_jz47xx/system-jz4760.c
index 7bbf6d36ae..072bdb49b8 100644
--- a/firmware/target/mips/ingenic_jz47xx/system-jz4760.c
+++ b/firmware/target/mips/ingenic_jz47xx/system-jz4760.c
@@ -478,7 +478,7 @@ static void pll0_init(unsigned int freq)
      * Init USB Host clock, pllout2 must be n*48MHz
      * For JZ4760b UHC - River.
      */
-    usbdiv = (cfcr & CPCCR_PCS) ? CPU_FREQ : (CPU_FREQ / 2);
+    usbdiv = (cfcr & CPCCR_PCS) ? freq : (freq / 2);
     REG_CPM_UHCCDR = usbdiv / 48000000 - 1;
 
     /* init PLL */