diff --git a/src/protocol.c b/src/protocol.c
index 809cac6..2985f3c 100644
--- a/src/protocol.c
+++ b/src/protocol.c
@@ -110,7 +110,7 @@ static bool spawn_process(struct pss_tty *pss, uint16_t columns, uint16_t rows)
     char *filePath = xmalloc(file_path_len);
     snprintf(filePath, file_path_len, "%sXXXXXX", server->arg_file);
 
-    if ((fd = mkstemp(filePath)) != -1) {
+    if ((fd = mkstemp(filePath)) == -1) {
       lwsl_err("Creation of temp file failed with error: %d (%s)\n", errno, strerror(errno));
       return false;
     }
@@ -124,7 +124,7 @@ static bool spawn_process(struct pss_tty *pss, uint16_t columns, uint16_t rows)
 
     if (close(fd) != 0) {
       lwsl_err("Close temp file failed with error: %d (%s)\n", errno, strerror(errno));
-      return false
+      return false;
     }
     argv[n++] = filePath;
   }
@@ -166,7 +166,7 @@ static void wsi_output(struct lws *wsi, pty_buf_t *buf) {
 int callback_tty(struct lws *wsi, enum lws_callback_reasons reason, void *user, void *in,
                  size_t len) {
   struct pss_tty *pss = (struct pss_tty *)user;
-  char buf[256];
+  char buf[1024];
   size_t n = 0;
 
   switch (reason) {