diff --git a/src/nvim/api/buffer.c b/src/nvim/api/buffer.c
index 09528b016b..fd3c76cc39 100644
--- a/src/nvim/api/buffer.c
+++ b/src/nvim/api/buffer.c
@@ -219,7 +219,6 @@ void buffer_set_slice(Buffer buffer,
 
     // Same as with replacing
     lines[i] = NULL;
-    i++;
     extra++;
   }