diff --git a/Marlin/src/HAL/HAL_STM32/fastio.h b/Marlin/src/HAL/HAL_STM32/fastio.h
index fa94d4703c..c17901fa99 100644
--- a/Marlin/src/HAL/HAL_STM32/fastio.h
+++ b/Marlin/src/HAL/HAL_STM32/fastio.h
@@ -55,7 +55,7 @@ void FastIO_init(); // Must be called before using fast io macros
     else   FastIOPortMap[STM_PORT(digitalPin[IO])]->BRR  = _BV32(STM_PIN(digitalPin[IO])) ; \
   }while(0)
 #else
-  #define _WRITE(IO, V) (FastIOPortMap[STM_PORT(digitalPin[IO])]->BSRR = _BV32(STM_PIN(digitalPin[IO]) + (V ? 0 : 16)))
+  #define _WRITE(IO, V) (FastIOPortMap[STM_PORT(digitalPin[IO])]->BSRR = _BV32(STM_PIN(digitalPin[IO]) + ((V) ? 0 : 16)))
 #endif
 
 #define _READ(IO)               bool(READ_BIT(FastIOPortMap[STM_PORT(digitalPin[IO])]->IDR, _BV32(STM_PIN(digitalPin[IO]))))