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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);
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