diff --git a/shared-bindings/rgbmatrix/RGBMatrix.c b/shared-bindings/rgbmatrix/RGBMatrix.c
index 045cc82b8fb30..0188fa0b609b1 100644
--- a/shared-bindings/rgbmatrix/RGBMatrix.c
+++ b/shared-bindings/rgbmatrix/RGBMatrix.c
@@ -441,6 +441,7 @@ STATIC mp_int_t rgbmatrix_rgbmatrix_get_buffer(mp_obj_t self_in, mp_buffer_info_
         return 1;
     }
     *bufinfo = self->bufinfo;
+    bufinfo->typecode = 'H';
     return 0;
 }