diff --git a/sys/dev/sdhci/sdhci.c b/sys/dev/sdhci/sdhci.c
--- a/sys/dev/sdhci/sdhci.c
+++ b/sys/dev/sdhci/sdhci.c
@@ -1141,6 +1141,11 @@
 		    SDHCI_CARD_PRESENT_TICKS, sdhci_card_poll, slot);
 	}
 
+	SYSCTL_ADD_UINT(device_get_sysctl_ctx(slot->bus),
+	    SYSCTL_CHILDREN(device_get_sysctl_tree(slot->bus)), OID_AUTO,
+	    "quirks", CTLFLAG_RD, &slot->quirks, 0,
+	    "Slot quirks");
+
 	sdhci_init(slot);
 
 	snprintf(node_name, sizeof(node_name), "slot%d", slot->num);