diff --git a/drivers/pnp/interface.c b/drivers/pnp/interface.c
index 187e4a1175b0..602c46893e83 100644
--- a/drivers/pnp/interface.c
+++ b/drivers/pnp/interface.c
@@ -33,6 +33,7 @@ struct pnp_info_buffer {
 
 typedef struct pnp_info_buffer pnp_info_buffer_t;
 
+__printf(2, 3)
 static int pnp_printf(pnp_info_buffer_t * buffer, char *fmt, ...)
 {
 	va_list args;