diff --git a/src/tools/pkcs11-tool.c b/src/tools/pkcs11-tool.c
index fcac44e0..869294a0 100644
--- a/src/tools/pkcs11-tool.c
+++ b/src/tools/pkcs11-tool.c
@@ -610,7 +610,9 @@ int main(int argc, char * argv[])
 	}
 
 	if (do_sign) {
-		if (!find_object(session, CKO_PRIVATE_KEY, &object, NULL, 0, 0))
+		if (!find_object(session, CKO_PRIVATE_KEY, &object, 
+					opt_object_id_len ? opt_object_id : NULL, 
+					opt_object_id_len, 0))
 			util_fatal("Private key not found");
 	}