diff --git a/src/libopensc/card-iasecc.c b/src/libopensc/card-iasecc.c
index 716051cb..c12f3de4 100644
--- a/src/libopensc/card-iasecc.c
+++ b/src/libopensc/card-iasecc.c
@@ -2282,6 +2282,40 @@ iasecc_sdo_create(struct sc_card *card, struct iasecc_sdo *sdo)
 	LOG_FUNC_RETURN(ctx, rv);
 }
 
+/* Oberthur's specific */
+static int
+iasecc_sdo_delete(struct sc_card *card, struct iasecc_sdo *sdo)
+{
+	struct sc_context *ctx = card->ctx;
+	struct sc_apdu apdu;
+	unsigned char data[6] = {
+		0x70, 0x04, 0xBF, 0xFF, 0xFF, 0x00
+	};
+	int rv;
+
+	LOG_FUNC_CALLED(ctx);
+	if (sdo->magic != SC_CARDCTL_IASECC_SDO_MAGIC)
+		LOG_TEST_RET(ctx, SC_ERROR_INVALID_DATA, "Invalid SDO data");
+
+	data[2] = IASECC_SDO_TAG_HEADER;
+	data[3] = sdo->sdo_class | 0x80;
+	data[4] = sdo->sdo_ref;
+	sc_log(ctx, "delete SDO %02X%02X%02X", data[2], data[3], data[4]);
+
+	sc_format_apdu(card, &apdu, SC_APDU_CASE_3_SHORT, 0xDB, 0x3F, 0xFF);
+	apdu.data = data;
+	apdu.datalen = sizeof(data);
+	apdu.lc = sizeof(data);
+	apdu.flags |= SC_APDU_FLAGS_CHAINING;
+
+	rv = sc_transmit_apdu(card, &apdu);
+	LOG_TEST_RET(ctx, rv, "APDU transmit failed");
+	rv = sc_check_sw(card, apdu.sw1, apdu.sw2);
+	LOG_TEST_RET(ctx, rv, "delete SDO error");
+
+	LOG_FUNC_RETURN(ctx, rv);
+}
+
 
 static int
 iasecc_sdo_put_data(struct sc_card *card, struct iasecc_sdo_update *update)
@@ -2591,6 +2625,9 @@ iasecc_card_ctl(struct sc_card *card, unsigned long cmd, void *ptr)
 	case SC_CARDCTL_IASECC_SDO_CREATE:
 		sc_log(ctx, "CMD SC_CARDCTL_IASECC_SDO_CREATE: sdo_class %X", sdo->sdo_class);
 		return iasecc_sdo_create(card, (struct iasecc_sdo *) ptr);
+	case SC_CARDCTL_IASECC_SDO_DELETE:
+		sc_log(ctx, "CMD SC_CARDCTL_IASECC_SDO_DELETE: sdo_class %X", sdo->sdo_class);
+		return iasecc_sdo_delete(card, (struct iasecc_sdo *) ptr);
 	case SC_CARDCTL_IASECC_SDO_PUT_DATA:
 		sc_log(ctx, "CMD SC_CARDCTL_IASECC_SDO_PUT_DATA: sdo_class %X", sdo->sdo_class);
 		return iasecc_sdo_put_data(card, (struct iasecc_sdo_update *) ptr);
diff --git a/src/libopensc/cardctl.h b/src/libopensc/cardctl.h
index 365c1fef..b01e7553 100644
--- a/src/libopensc/cardctl.h
+++ b/src/libopensc/cardctl.h
@@ -228,6 +228,7 @@ enum {
 	SC_CARDCTL_IASECC_SDO_GET_DATA,
 	SC_CARDCTL_IASECC_SDO_GENERATE,
 	SC_CARDCTL_IASECC_SDO_CREATE,
+	SC_CARDCTL_IASECC_SDO_DELETE,
 };
 
 enum {