diff --git a/arch/arm/src/kinetis/kinetis_serial.c b/arch/arm/src/kinetis/kinetis_serial.c
index 53fd7e2b4ab..94966f72a27 100644
--- a/arch/arm/src/kinetis/kinetis_serial.c
+++ b/arch/arm/src/kinetis/kinetis_serial.c
@@ -875,7 +875,7 @@ static int up_interrupts(int irq, void *context)
   else
 #endif
 #ifdef CONFIG_KINETIS_UART5
-  if (g_uart5priv.irq == irqs)
+  if (g_uart5priv.irqs == irq)
     {
       dev = &g_uart5port;
     }