diff --git a/main.c b/main.c
index c006fc5..fcf4698 100644
--- a/main.c
+++ b/main.c
@@ -2516,7 +2516,6 @@ copy_fd_to_fd (int sfd, int dfd, char *buf, size_t buf_size)
         ret = TEMP_FAILURE_RETRY (write (dfd, buf + written, nread));
         if (ret < 0)
           return ret;
-        written += ret;
         nread -= ret;
       }
       while (nread);
@@ -2830,7 +2829,6 @@ empty_dirfd (int fd)
 static int
 empty_dir (struct ovl_layer *l, const char *path)
 {
-  cleanup_dir DIR *dp = NULL;
   cleanup_close int cleanup_fd = -1;
   int ret;
 
diff --git a/utils.c b/utils.c
index 7b92b9c..48ac146 100644
--- a/utils.c
+++ b/utils.c
@@ -94,8 +94,6 @@ strconcat3 (char *dest, size_t size, const char *s1, const char *s2, const char
 
       memcpy (current, s3, t);
       current += t;
-
-      size -= t;
     }
   *current = '\0';