diff --git a/arch/arm/src/stm32f7/stm32_serial.c b/arch/arm/src/stm32f7/stm32_serial.c
index 5b57549a8e..1f5445ac71 100644
--- a/arch/arm/src/stm32f7/stm32_serial.c
+++ b/arch/arm/src/stm32f7/stm32_serial.c
@@ -290,7 +290,7 @@ struct up_dev_s
   bool              rxenable;  /* DMA-based reception en/disable */
   uint16_t          rxdmain;   /* Next byte in the DMA where hardware will write */
   uint16_t          rxdmaout;  /* Next byte in the DMA buffer to be read */
-  VAR char * const  rxfifo;    /* Receive DMA buffer */
+  char      *const  rxfifo;    /* Receive DMA buffer */
 #endif
 
 #ifdef HAVE_RS485