diff --git a/panda/src/display/graphicsOutput.cxx b/panda/src/display/graphicsOutput.cxx
index b060b587a5..962e0dcf24 100644
--- a/panda/src/display/graphicsOutput.cxx
+++ b/panda/src/display/graphicsOutput.cxx
@@ -954,6 +954,8 @@ make_texture_buffer(const string &name, int x_size, int y_size,
 
   FrameBufferProperties props;
   props.set_rgb_color(1);
+  props.set_color_bits(1);
+  props.set_alpha_bits(1);
   props.set_depth_bits(1);
 
   if (fbp == NULL) {