diff --git a/sys/sparc64/central/central.c b/sys/sparc64/central/central.c
index e3f364d6ee0b..4a9acfc8ae12 100644
--- a/sys/sparc64/central/central.c
+++ b/sys/sparc64/central/central.c
@@ -133,7 +133,8 @@ central_attach(device_t dev)
 			continue;
 		cdev = device_add_child(dev, NULL, -1);
 		if (cdev != NULL) {
-			cdi = malloc(sizeof(*cdi), M_DEVBUF, M_ZERO);
+			cdi = malloc(sizeof(*cdi), M_DEVBUF,
+			    M_WAITOK | M_ZERO);
 			cdi->cdi_name = name;
 			cdi->cdi_node = child;
 			OF_getprop_alloc(child, "device_type", 1,
diff --git a/sys/sparc64/fhc/fhc.c b/sys/sparc64/fhc/fhc.c
index 6b7c8139a4c2..f12bbc9dc7b2 100644
--- a/sys/sparc64/fhc/fhc.c
+++ b/sys/sparc64/fhc/fhc.c
@@ -123,7 +123,8 @@ fhc_attach(device_t dev)
 			continue;
 		cdev = device_add_child(dev, NULL, -1);
 		if (cdev != NULL) {
-			fdi = malloc(sizeof(*fdi), M_DEVBUF, M_ZERO);
+			fdi = malloc(sizeof(*fdi), M_DEVBUF,
+			    M_WAITOK | M_ZERO);
 			fdi->fdi_name = name;
 			fdi->fdi_node = child;
 			OF_getprop_alloc(child, "device_type", 1,