diff --git a/firmware/target/arm/usb-drv-pp502x.c b/firmware/target/arm/usb-drv-pp502x.c
index e35b4da67f..06358669c6 100644
--- a/firmware/target/arm/usb-drv-pp502x.c
+++ b/firmware/target/arm/usb-drv-pp502x.c
@@ -353,7 +353,6 @@ bool usb_drv_powered(void)
 /* manual: 32.14.1 Device Controller Initialization */
 void usb_drv_init(void)
 {
-    trigger_cpu_boost();
     REG_USBCMD &= ~USBCMD_RUN;
     udelay(50000);
     REG_USBCMD |= USBCMD_CTRL_RESET;
diff --git a/firmware/usbstack/usb_storage.c b/firmware/usbstack/usb_storage.c
index 59339eb1c3..9488f8aecc 100644
--- a/firmware/usbstack/usb_storage.c
+++ b/firmware/usbstack/usb_storage.c
@@ -879,6 +879,7 @@ static void handle_scsi(struct command_block_wrapper* cbw)
                 cur_sense_data.ascq=0;
             }
             else {
+                trigger_cpu_boost();
                 cur_cmd.last_result = ata_read_sectors(IF_MV2(cur_cmd.lun,)
                                              cur_cmd.sector,
                                              MIN(BUFFER_SIZE/SECTOR_SIZE,
@@ -916,6 +917,7 @@ static void handle_scsi(struct command_block_wrapper* cbw)
                 cur_sense_data.ascq=0;
             }
             else {
+                trigger_cpu_boost();
                 receive_block_data(cur_cmd.data[0],
                                    MIN(BUFFER_SIZE,
                                    cur_cmd.count*SECTOR_SIZE));
@@ -951,6 +953,7 @@ static void receive_block_data(void *data,int size)
 
 static void send_csw(int status)
 {
+    cancel_cpu_boost();
     tb.csw->signature = htole32(CSW_SIGNATURE);
     tb.csw->tag = cur_cmd.tag;
     tb.csw->data_residue = 0;