diff --git a/firmware/target/arm/rk27xx/sd-rk27xx.c b/firmware/target/arm/rk27xx/sd-rk27xx.c
index f3081d2d7d..b6cd88fe31 100644
--- a/firmware/target/arm/rk27xx/sd-rk27xx.c
+++ b/firmware/target/arm/rk27xx/sd-rk27xx.c
@@ -402,6 +402,7 @@ static void init_controller(void)
     SCU_IOMUXA_CON |= IOMUX_SD;
 
     /* enable and unmask SD interrupts in interrupt controller */
+    SCU_CLKCFG &= ~(1<<22);
     INTC_IMR |= (1<<10);
     INTC_IECR |= (1<<10);