diff --git a/usr.sbin/config.old/config.y b/usr.sbin/config.old/config.y
index 8a4057462c61..d768cdcb3eac 100644
--- a/usr.sbin/config.old/config.y
+++ b/usr.sbin/config.old/config.y
@@ -752,7 +752,7 @@ init_dev(dp)
 	dp->d_slave = dp->d_drive = dp->d_unit = UNKNOWN;
 	dp->d_port = (char *)0;
 	dp->d_portn = 0;
-	dp->d_irq = -1;
+	dp->d_irq = -2;
 	dp->d_drq = -1;
 	dp->d_maddr = 0;
 	dp->d_msize = 0;
diff --git a/usr.sbin/config/config.y b/usr.sbin/config/config.y
index 8a4057462c61..d768cdcb3eac 100644
--- a/usr.sbin/config/config.y
+++ b/usr.sbin/config/config.y
@@ -752,7 +752,7 @@ init_dev(dp)
 	dp->d_slave = dp->d_drive = dp->d_unit = UNKNOWN;
 	dp->d_port = (char *)0;
 	dp->d_portn = 0;
-	dp->d_irq = -1;
+	dp->d_irq = -2;
 	dp->d_drq = -1;
 	dp->d_maddr = 0;
 	dp->d_msize = 0;