diff --git a/src/libopensc/card-authentic.c b/src/libopensc/card-authentic.c
index fb88404a..1d3bb267 100644
--- a/src/libopensc/card-authentic.c
+++ b/src/libopensc/card-authentic.c
@@ -813,7 +813,7 @@ authentic_read_binary(struct sc_card *card, unsigned int idx,
 	struct sc_context *ctx = card->ctx;
 	struct sc_apdu apdu;
 	size_t sz, rest, ret_count = 0;
-	int rv;
+	int rv = SC_SUCCESS;
 
 	LOG_FUNC_CALLED(ctx);
 	sc_log(ctx,
@@ -859,7 +859,7 @@ authentic_write_binary(struct sc_card *card, unsigned int idx,
 	struct sc_context *ctx = card->ctx;
 	struct sc_apdu apdu;
 	size_t sz, rest;
-	int rv;
+	int rv = SC_SUCCESS;
 
 	LOG_FUNC_CALLED(ctx);
 	sc_log(ctx,
@@ -902,7 +902,7 @@ authentic_update_binary(struct sc_card *card, unsigned int idx,
 	struct sc_context *ctx = card->ctx;
 	struct sc_apdu apdu;
 	size_t sz, rest;
-	int rv;
+	int rv = SC_SUCCESS;
 
 	LOG_FUNC_CALLED(ctx);
 	sc_log(ctx,