diff --git a/sys/dev/uart/uart_cpu_alpha.c b/sys/dev/uart/uart_cpu_alpha.c
index f7a2f8bb5d4..00aa1de354b 100644
--- a/sys/dev/uart/uart_cpu_alpha.c
+++ b/sys/dev/uart/uart_cpu_alpha.c
@@ -95,6 +95,7 @@ uart_cpu_getdev(int devtype, struct uart_devinfo *di)
 	}
 
 	/* Check the environment. */
+	di->ops = uart_ns8250_ops;
 	if (uart_getenv(devtype, di) == 0)
 		return (0);
 
diff --git a/sys/dev/uart/uart_cpu_amd64.c b/sys/dev/uart/uart_cpu_amd64.c
index 498496b86b9..fb8b99476eb 100644
--- a/sys/dev/uart/uart_cpu_amd64.c
+++ b/sys/dev/uart/uart_cpu_amd64.c
@@ -52,6 +52,7 @@ uart_cpu_getdev(int devtype, struct uart_devinfo *di)
 	unsigned int i, ivar;
 
 	/* Check the environment. */
+	di->ops = uart_ns8250_ops;
 	if (uart_getenv(devtype, di) == 0)
 		return (0);
 
diff --git a/sys/dev/uart/uart_cpu_i386.c b/sys/dev/uart/uart_cpu_i386.c
index 673dde54b25..c8e2e2ec721 100644
--- a/sys/dev/uart/uart_cpu_i386.c
+++ b/sys/dev/uart/uart_cpu_i386.c
@@ -52,6 +52,7 @@ uart_cpu_getdev(int devtype, struct uart_devinfo *di)
 	unsigned int i, ivar;
 
 	/* Check the environment. */
+	di->ops = uart_ns8250_ops;
 	if (uart_getenv(devtype, di) == 0)
 		return (0);
 
diff --git a/sys/dev/uart/uart_cpu_ia64.c b/sys/dev/uart/uart_cpu_ia64.c
index cf1e7e178e9..496049200c2 100644
--- a/sys/dev/uart/uart_cpu_ia64.c
+++ b/sys/dev/uart/uart_cpu_ia64.c
@@ -104,5 +104,6 @@ uart_cpu_getdev(int devtype, struct uart_devinfo *di)
 	}
 
 	/* Check the environment. */
+	di->ops = uart_ns8250_ops;
 	return (uart_getenv(devtype, di));
 }
diff --git a/sys/dev/uart/uart_cpu_pc98.c b/sys/dev/uart/uart_cpu_pc98.c
index 0ae25596772..0887a676662 100644
--- a/sys/dev/uart/uart_cpu_pc98.c
+++ b/sys/dev/uart/uart_cpu_pc98.c
@@ -52,6 +52,7 @@ uart_cpu_getdev(int devtype, struct uart_devinfo *di)
 	unsigned int i, ivar, flags;
 
 	/* Check the environment. */
+	di->ops = uart_ns8250_ops;
 	if (uart_getenv(devtype, di) == 0)
 		return (0);
 
diff --git a/sys/dev/uart/uart_subr.c b/sys/dev/uart/uart_subr.c
index 14ce64b1b84..c9b6fe7ab50 100644
--- a/sys/dev/uart/uart_subr.c
+++ b/sys/dev/uart/uart_subr.c
@@ -182,7 +182,6 @@ uart_getenv(int devtype, struct uart_devinfo *di)
 		return (ENXIO);
 
 	/* Set defaults. */
-	di->ops = uart_ns8250_ops;
 	di->bas.chan = 0;
 	di->bas.regshft = 0;
 	di->bas.rclk = 0;