diff --git a/libcacard/cac.c b/libcacard/cac.c
index f4b0b1b05799ef17db866c229449fd488754bb45..927a4ca29634dd65591fa64900786e7e97e3fd36 100644
--- a/libcacard/cac.c
+++ b/libcacard/cac.c
@@ -266,7 +266,8 @@ static void
 cac_delete_pki_applet_private(VCardAppletPrivate *applet_private)
 {
     CACPKIAppletData *pki_applet_data = NULL;
-    if (pki_applet_data == NULL) {
+
+    if (applet_private == NULL) {
         return;
     }
     pki_applet_data = &(applet_private->u.pki_data);
diff --git a/libcacard/card_7816.c b/libcacard/card_7816.c
index 9fd59d4a5f99a1c14fe77bced2b4efcee82f0685..6fe27d56313cb87a2b52179b1a7b2b4f46df66fd 100644
--- a/libcacard/card_7816.c
+++ b/libcacard/card_7816.c
@@ -754,7 +754,7 @@ vcard_process_apdu(VCard *card, VCardAPDU *apdu, VCardResponse **response)
         return vcard7816_vm_process_apdu(card, apdu, response);
     case VCARD_DIRECT:
         /* if we are type direct, then the applet should handle everything */
-        assert("VCARD_DIRECT: applet failure");
+        assert(!"VCARD_DIRECT: applet failure");
         break;
     }
     *response =
diff --git a/libcacard/vscclient.c b/libcacard/vscclient.c
index 2191f6038c0156284c99f34bb1714ae02e6c5edd..e317a25faf1f7df9acb20c989dcd557ed566cd72 100644
--- a/libcacard/vscclient.c
+++ b/libcacard/vscclient.c
@@ -357,6 +357,7 @@ connect_to_qemu(
     if (sock < 0) {
         /* Error */
         fprintf(stderr, "Error opening socket!\n");
+        return -1;
     }
 
     memset(&hints, 0, sizeof(struct addrinfo));
@@ -370,13 +371,13 @@ connect_to_qemu(
     if (ret != 0) {
         /* Error */
         fprintf(stderr, "getaddrinfo failed\n");
-        return 5;
+        return -1;
     }
 
     if (connect(sock, server->ai_addr, server->ai_addrlen) < 0) {
         /* Error */
         fprintf(stderr, "Could not connect\n");
-        return 5;
+        return -1;
     }
     if (verbose) {
         printf("Connected (sizeof Header=%zd)!\n", sizeof(VSCMsgHeader));
@@ -505,6 +506,10 @@ main(
     qemu_host = strdup(argv[argc - 2]);
     qemu_port = strdup(argv[argc - 1]);
     sock = connect_to_qemu(qemu_host, qemu_port);
+    if (sock == -1) {
+        fprintf(stderr, "error opening socket, exiting.\n");
+        exit(5);
+    }
 
     qemu_mutex_init(&write_lock);
     qemu_mutex_init(&pending_reader_lock);