diff --git a/os/hal/ports/STM32/STM32L4xx/ext_lld_isr.h b/os/hal/ports/STM32/STM32L4xx/ext_lld_isr.h
index ceb2a8f91..3e9d686b6 100644
--- a/os/hal/ports/STM32/STM32L4xx/ext_lld_isr.h
+++ b/os/hal/ports/STM32/STM32L4xx/ext_lld_isr.h
@@ -95,13 +95,6 @@
 #define STM32_EXT_EXTI16_IRQ_PRIORITY       6
 #endif
 
-/**
- * @brief   EXTI17 interrupt priority level setting.
- */
-#if !defined(STM32_EXT_EXTI17_IRQ_PRIORITY) || defined(__DOXYGEN__)
-#define STM32_EXT_EXTI17_IRQ_PRIORITY       6
-#endif
-
 /**
  * @brief   EXTI18 interrupt priority level setting.
  */