diff --git a/sys/kern/subr_bus.c b/sys/kern/subr_bus.c
index 71924cc7fe6b..9c07bf1fac3a 100644
--- a/sys/kern/subr_bus.c
+++ b/sys/kern/subr_bus.c
@@ -1777,6 +1777,14 @@ device_probe_child(device_t dev, device_t child)
 			 * of pri for the first match.
 			 */
 			if (best == NULL || result > pri) {
+				/*
+				 * Probes that return BUS_PROBE_NOWILDCARD
+				 * or lower only match when they are set
+				 * in stone by the parent bus.
+				 */
+				if (result <= BUS_PROBE_NOWILDCARD &&
+				    child->flags & DF_WILDCARD)
+					continue;
 				best = dl;
 				pri = result;
 				continue;
diff --git a/sys/sys/bus.h b/sys/sys/bus.h
index 14634371b260..6e57c3d6ba78 100644
--- a/sys/sys/bus.h
+++ b/sys/sys/bus.h
@@ -494,7 +494,10 @@ void	bus_data_generation_update(void);
  * is for drivers that wish to have a generic form and a specialized form,
  * like is done with the pci bus and the acpi pci bus.  BUS_PROBE_HOOVER is
  * for those busses that implement a generic device place-holder for devices on
- * the bus that have no more specific driver for them (aka ugen).
+ * the bus that have no more specific river for them (aka ugen).
+ * BUS_PROBE_NOWILDCARD or lower means that the device isn't really bidding
+ * for a device node, but accepts only devices that its parent has told it
+ * use this driver.
  */
 #define BUS_PROBE_SPECIFIC	0	/* Only I can use this device */
 #define BUS_PROBE_VENDOR	(-10)	/* Vendor supplied driver */
@@ -502,6 +505,7 @@ void	bus_data_generation_update(void);
 #define BUS_PROBE_LOW_PRIORITY	(-40)	/* Older, less desirable drivers */
 #define BUS_PROBE_GENERIC	(-100)	/* generic driver for dev */
 #define BUS_PROBE_HOOVER	(-500)	/* Generic dev for all devs on bus */
+#define BUS_PROBE_NOWILDCARD	(-2000000000) /* No wildcard device matches */
 
 /**
  * Shorthand for constructing method tables.