diff --git a/parson.c b/parson.c
index 20cb43f..4e0d3da 100644
--- a/parson.c
+++ b/parson.c
@@ -991,9 +991,6 @@ static int json_serialize_to_buffer_r(const JSON_Value *value, char *buf, int le
             if (written < 0) {
                 return -1;
             }
-            if (buf != NULL) {
-                buf += written;
-            }
             written_total += written;
             return written_total;
         case JSONBoolean:
@@ -1012,9 +1009,6 @@ static int json_serialize_to_buffer_r(const JSON_Value *value, char *buf, int le
             if (written < 0) {
                 return -1;
             }
-            if (buf != NULL) {
-                buf += written;
-            }
             written_total += written;
             return written_total;
         case JSONNull: