diff --git a/board/overo/overo.c b/board/overo/overo.c
index b7f85e7..0c2be4c 100644
--- a/board/overo/overo.c
+++ b/board/overo/overo.c
@@ -359,6 +359,7 @@
 		MUX_GUMSTIX();
 		MUX_ARBOR43C();
 		setenv("defaultdisplay", "lcd43");
+		setenv("expansionname", "arbor43c");
 		break;
 	case ETTUS_USRP_E:
 		printf("Recognized Ettus Research USRP-E (rev %d %s)\n",