diff --git a/src/artifact.c b/src/artifact.c
index a20682ac3..6f3a7aa27 100644
--- a/src/artifact.c
+++ b/src/artifact.c
@@ -425,7 +425,7 @@ boolean is_worn;
 {
 	const struct artifact *arti;
 
-	if (is_worn && objects[otmp->oclass].oc_oprop == PROTECTION)
+	if (is_worn && objects[otmp->otyp].oc_oprop == PROTECTION)
 	    return TRUE;
 	arti = get_artifact(otmp);
 	if (!arti) return FALSE;