diff --git a/os/hal/ports/STM32/LLD/OTGv1/usb_lld.c b/os/hal/ports/STM32/LLD/OTGv1/usb_lld.c
index 455c1c77e..6d2450de9 100644
--- a/os/hal/ports/STM32/LLD/OTGv1/usb_lld.c
+++ b/os/hal/ports/STM32/LLD/OTGv1/usb_lld.c
@@ -515,11 +515,11 @@ static bool otg_txfifo_handler(USBDriver *usbp, usbep_t ep) {
                                  n);
       usbp->epc[ep]->in_state->mode.linear.txbuf += n;
     }
-    usbp->epc[ep]->in_state->txcnt += n;
-  }
 #if STM32_USB_OTGFIFO_FILL_BASEPRI
   __set_BASEPRI(0);
 #endif
+    usbp->epc[ep]->in_state->txcnt += n;
+  }
 }
 
 /**