michael@0: diff --git a/gfx/cairo/cairo/src/cairo-gstate.c b/gfx/cairo/cairo/src/cairo-gstate.c
michael@0: index 0439bcf..32a5c4b 100644
michael@0: --- a/gfx/cairo/cairo/src/cairo-gstate.c
michael@0: +++ b/gfx/cairo/cairo/src/cairo-gstate.c
michael@0: @@ -1271,8 +1271,13 @@ _cairo_gstate_set_font_matrix (cairo_gstate_t	    *gstate,
michael@0:      if (memcmp (matrix, &gstate->font_matrix, sizeof (cairo_matrix_t)) == 0)
michael@0:  	return CAIRO_STATUS_SUCCESS;
michael@0:  
michael@0: -    if (! _cairo_matrix_is_invertible (matrix))
michael@0: -	return _cairo_error (CAIRO_STATUS_INVALID_MATRIX);
michael@0: +    if (! _cairo_matrix_is_invertible (matrix)) {
michael@0: +	/* rank 0 matrices are ok even though they are not invertible */
michael@0: +	if (!(matrix->xx == 0. && matrix->xy == 0. &&
michael@0: +	      matrix->yx == 0. && matrix->yy == 0.)) {
michael@0: +	    return _cairo_error (CAIRO_STATUS_INVALID_MATRIX);
michael@0: +	}
michael@0: +    }
michael@0:  
michael@0:      _cairo_gstate_unset_scaled_font (gstate);
michael@0: