diff --git a/sys/dev/pccbb/pccbb.c b/sys/dev/pccbb/pccbb.c
index 4dfce5fc63e7..7c678419e5c6 100644
--- a/sys/dev/pccbb/pccbb.c
+++ b/sys/dev/pccbb/pccbb.c
@@ -1446,6 +1446,7 @@ cbb_cardbus_alloc_resource(device_t brdev, device_t child, int type,
 			return (NULL);
 		}
 		start = end = tmp;
+		flags |= RF_SHAREABLE;
 		break;
 	case SYS_RES_IOPORT:
 		if (start <= cbb_start_32_io)