diff --git a/src/libopensc/card-piv.c b/src/libopensc/card-piv.c
index d25c4406..62ac7df1 100644
--- a/src/libopensc/card-piv.c
+++ b/src/libopensc/card-piv.c
@@ -1556,9 +1556,10 @@ static int piv_general_mutual_authenticate(sc_card_t *card,
 	}
 
 	r = sc_lock(card);
-	if (r != SC_SUCCESS)
+	if (r != SC_SUCCESS) {
 		sc_debug(card->ctx, SC_LOG_DEBUG_VERBOSE, "sc_lock failed\n");
 		goto err; /* cleanup */
+	}
 	locked = 1;
 
 	p = sbuf;
@@ -1827,9 +1828,10 @@ static int piv_general_external_authenticate(sc_card_t *card,
 	}
 
 	r = sc_lock(card);
-	if (r != SC_SUCCESS)
+	if (r != SC_SUCCESS) {
 		sc_debug(card->ctx, SC_LOG_DEBUG_VERBOSE, "sc_lock failed\n");
 		goto err; /* cleanup */
+	}
 	locked = 1;
 
 	p = sbuf;