diff --git a/os/hal/platforms/STM32/OTGv1/usb_lld.h b/os/hal/platforms/STM32/OTGv1/usb_lld.h
index 3b8344e55..cb55894f5 100644
--- a/os/hal/platforms/STM32/OTGv1/usb_lld.h
+++ b/os/hal/platforms/STM32/OTGv1/usb_lld.h
@@ -106,7 +106,7 @@
 /**
  * @brief   Dedicated data pump threads priority.
  */
-#if !defined(STM32_USB_OTG_THREAD_PRIORITY) || defined(__DOXYGEN__)
+#if !defined(STM32_USB_OTG_THREAD_PRIO) || defined(__DOXYGEN__)
 #define STM32_USB_OTG_THREAD_PRIO           LOWPRIO
 #endif
 
diff --git a/readme.txt b/readme.txt
index 7cd483b38..c1c5b57bf 100644
--- a/readme.txt
+++ b/readme.txt
@@ -82,6 +82,7 @@
 *****************************************************************************
 
 *** 2.5.2 ***
+- FIX: Fixed #define typo in usb_lld.h (OTGv1) (bug 3602306).
 - FIX: Fixed STM32F0 RCC enable/disable/reset functions for CRC and WWDG
   (bug 3602150).
 - FIX: Fixed missing parenthesis in use of macro arguments (bug 3601638).