diff --git a/doc/source/arb_poly.rst b/doc/source/arb_poly.rst
index 9aff6f70c7..14d330b2bd 100644
--- a/doc/source/arb_poly.rst
+++ b/doc/source/arb_poly.rst
@@ -318,8 +318,6 @@ Arithmetic
 
 .. function:: void arb_poly_mullow_classical(arb_poly_t C, const arb_poly_t A, const arb_poly_t B, slong n, slong prec)
 
-.. function:: void arb_poly_mullow_ztrunc(arb_poly_t C, const arb_poly_t A, const arb_poly_t B, slong n, slong prec)
-
 .. function:: void arb_poly_mullow_block(arb_poly_t C, const arb_poly_t A, const arb_poly_t B, slong n, slong prec)
 
 .. function:: void arb_poly_mullow(arb_poly_t C, const arb_poly_t A, const arb_poly_t B, slong n, slong prec)
diff --git a/src/arb_poly.h b/src/arb_poly.h
index 2cb7d94872..bf71f2b744 100644
--- a/src/arb_poly.h
+++ b/src/arb_poly.h
@@ -239,14 +239,6 @@ arb_poly_scalar_div(arb_poly_t res, const arb_poly_t poly, const arb_t c, slong
     _arb_poly_normalise(res);
 }
 
-void _arb_poly_mullow_ztrunc(arb_ptr res,
-    arb_srcptr poly1, slong len1,
-    arb_srcptr poly2, slong len2, slong n, slong prec);
-
-void arb_poly_mullow_ztrunc(arb_poly_t res, const arb_poly_t poly1,
-                                            const arb_poly_t poly2,
-                                                slong n, slong prec);
-
 void _arb_poly_mullow_classical(arb_ptr res,
     arb_srcptr poly1, slong len1,
     arb_srcptr poly2, slong len2, slong n, slong prec);