diff --git a/dlls/ddraw/executebuffer.c b/dlls/ddraw/executebuffer.c
index 80dbdfd88b6..9f0fdb85e54 100644
--- a/dlls/ddraw/executebuffer.c
+++ b/dlls/ddraw/executebuffer.c
@@ -107,7 +107,6 @@ HRESULT d3d_execute_buffer_execute(struct d3d_execute_buffer *buffer, struct d3d
                 }
 
                 index_count = count * primitive_size;
-
                 if (buffer->index_size < index_count)
                 {
                     unsigned int new_size = max(buffer->index_size * 2, index_count);
@@ -302,7 +301,7 @@ HRESULT d3d_execute_buffer_execute(struct d3d_execute_buffer *buffer, struct d3d
                         case D3DPROCESSVERTICES_TRANSFORMLIGHT:
                         case D3DPROCESSVERTICES_TRANSFORM:
                             wined3d_device_set_stream_source(device->wined3d_device, 0,
-                                    buffer->src_vertex_buffer, buffer->src_vertex_pos, sizeof(D3DVERTEX));
+                                    buffer->src_vertex_buffer, buffer->src_vertex_pos * sizeof(D3DVERTEX), sizeof(D3DVERTEX));
                             wined3d_device_set_render_state(device->wined3d_device, WINED3D_RS_LIGHTING,
                                     op == D3DPROCESSVERTICES_TRANSFORMLIGHT && !!device->material);
                             wined3d_device_set_vertex_declaration(device->wined3d_device,