1 files changed, 6 insertions, 2 deletions
diff --git a/lib/buffer.c b/lib/buffer.c
index acb813d..93c5295 100644
--- a/lib/buffer.c
+++ b/lib/buffer.c
@@ -225,11 +225,15 @@ char *
 ul_buffer_finalize (ul_buffer_t *buffer)
 {
   if (buffer->msg[buffer->len - 1] == ',')
-    buffer->msg[buffer->len - 1] = '}';
-  else
     {
       if (!_ul_buffer_ensure_size (buffer, buffer->len + 1))
         return NULL;
+      buffer->msg[buffer->len - 1] = '}';
+    }
+  else
+    {
+      if (!_ul_buffer_ensure_size (buffer, buffer->len + 2))
+        return NULL;
       buffer->msg[buffer->len++] = '}';
     }
   buffer->msg[buffer->len] = '\0';