diff --git a/arch/arm/src/lpc43xx/lpc43_ethernet.c b/arch/arm/src/lpc43xx/lpc43_ethernet.c
index 8b0b2b6c243..a0c097295e1 100644
--- a/arch/arm/src/lpc43xx/lpc43_ethernet.c
+++ b/arch/arm/src/lpc43xx/lpc43_ethernet.c
@@ -2171,7 +2171,7 @@ static void lpc43_txtimeout_expiry(int argc, uint32_t arg, ...)
    * Interrupts will be re-enabled when lpc43_ifup() is called.
    */
 
-  up_disable_irq(STM32_IRQ_ETH);
+  up_disable_irq(LPC43M4_IRQ_ETHERNET);
 
   /* Cancel any pending poll or interrupt work.  This will have no effect
    * on work that has already been started.