diff --git a/os/hal/ports/SN32/LLD/SN32F2xx/USB/hal_usb_lld.h b/os/hal/ports/SN32/LLD/SN32F2xx/USB/hal_usb_lld.h
index 44a19f2ccf..8de891831f 100644
--- a/os/hal/ports/SN32/LLD/SN32F2xx/USB/hal_usb_lld.h
+++ b/os/hal/ports/SN32/LLD/SN32F2xx/USB/hal_usb_lld.h
@@ -390,7 +390,9 @@ struct USBDriver {
 #define usb_lld_wakeup_host(usbp)                                           \
   do {                                                                      \
     SN32_USB->SGCTL = (mskBUS_DRVEN|mskBUS_K_STATE);                        \
-    osalThreadSleepMilliseconds(SN32_USB_HOST_WAKEUP_DURATION);             \
+    uint32_t loops = OSAL_MS2I(SN32_USB_HOST_WAKEUP_DURATION) *             \
+                     (SN32_HCLK / CH_CFG_ST_FREQUENCY / 9);                  \
+    for (uint32_t i = 0; i < loops; i++) __NOP();                           \
     SN32_USB->SGCTL &= ~mskBUS_DRVEN;                                       \
   } while (false)