1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/pnp/interface.c b/drivers/pnp/interface.c
index b09f67de13d0..7a9fb5544b80 100644
--- a/drivers/pnp/interface.c
+++ b/drivers/pnp/interface.c
@@ -90,6 +90,8 @@ static void pnp_print_irq(pnp_info_buffer_t * buffer, char *space,
                 pnp_printf(buffer, " High-Level");
         if (irq->flags & IORESOURCE_IRQ_LOWLEVEL)
                 pnp_printf(buffer, " Low-Level");
+        if (irq->flags & IORESOURCE_IRQ_OPTIONAL)
+                pnp_printf(buffer, " (optional)");
         pnp_printf(buffer, "\n");
 }