diff --git a/plat/allwinner/common/sunxi_security.c b/plat/allwinner/common/sunxi_security.c
index 1f16a0b..92c83b0 100644
--- a/plat/allwinner/common/sunxi_security.c
+++ b/plat/allwinner/common/sunxi_security.c
@@ -39,8 +39,8 @@
 	/* set MBUS clocks, bus clocks (AXI/AHB/APB) and PLLs to non-secure */
 	mmio_write_32(SUNXI_CCU_SEC_SWITCH_REG, 0x7);
 
-	/* set R_PRCM clocks to non-secure */
-	mmio_write_32(SUNXI_R_PRCM_BASE + R_PRCM_SEC_SWITCH_REG, 0x7);
+	/* Set R_PRCM bus clocks to non-secure */
+	mmio_write_32(SUNXI_R_PRCM_BASE + R_PRCM_SEC_SWITCH_REG, 0x1);
 
 	/* Set all DMA channels (16 max.) to non-secure */
 	mmio_write_32(SUNXI_DMA_BASE + DMA_SEC_REG, 0xffff);