diff --git a/gfx/cairo/cairo/src/cairo-gstate.c b/gfx/cairo/cairo/src/cairo-gstate.c

index 0439bcf..32a5c4b 100644

--- a/gfx/cairo/cairo/src/cairo-gstate.c

+++ b/gfx/cairo/cairo/src/cairo-gstate.c

@@ -1271,8 +1271,13 @@ _cairo_gstate_set_font_matrix (cairo_gstate_t	    *gstate,

     if (memcmp (matrix, &gstate->font_matrix, sizeof (cairo_matrix_t)) == 0)

 	return CAIRO_STATUS_SUCCESS;

-    if (! _cairo_matrix_is_invertible (matrix))

-	return _cairo_error (CAIRO_STATUS_INVALID_MATRIX);

+    if (! _cairo_matrix_is_invertible (matrix)) {

+	/* rank 0 matrices are ok even though they are not invertible */

+	if (!(matrix->xx == 0. && matrix->xy == 0. &&

+	      matrix->yx == 0. && matrix->yy == 0.)) {

+	    return _cairo_error (CAIRO_STATUS_INVALID_MATRIX);

+	}

+    }

     _cairo_gstate_unset_scaled_font (gstate);