diff --git a/ggml_extend.hpp b/ggml_extend.hpp
index 6dbbfaa99..f20606640 100644
--- a/ggml_extend.hpp
+++ b/ggml_extend.hpp
@@ -454,7 +454,7 @@ __STATIC_INLINE__ void sd_tiling(ggml_tensor* input, ggml_tensor* output, const
     ggml_tensor* input_tile  = ggml_new_tensor_4d(tiles_ctx, GGML_TYPE_F32, tile_size, tile_size, input->ne[2], 1);
     ggml_tensor* output_tile = ggml_new_tensor_4d(tiles_ctx, GGML_TYPE_F32, tile_size * scale, tile_size * scale, output->ne[2], 1);
     on_processing(input_tile, NULL, true);
-    int num_tiles = (input_width * input_height) / (non_tile_overlap * non_tile_overlap);
+    int num_tiles = ceil((float)input_width / non_tile_overlap) * ceil((float)input_height / non_tile_overlap);
     LOG_INFO("processing %i tiles", num_tiles);
     pretty_progress(1, num_tiles, 0.0f);
     int tile_count = 1;