diff --git a/gcc/range-op-mixed.h b/gcc/range-op-mixed.h
index 6944742ecbc1015fbdb12ffec575382fb788faae..ead41ed05158ab7f2bb92e7dedbb2aab992e2a01 100644
--- a/gcc/range-op-mixed.h
+++ b/gcc/range-op-mixed.h
@@ -551,6 +551,8 @@ public:
   bool op1_range (irange &r, tree type,
 		  const irange &lhs, const irange &op2,
 		  relation_trio rel = TRIO_VARYING) const final override;
+  void update_bitmask (irange &r, const irange &lh,
+		       const irange &rh) const final override;
 };
 
 class operator_bitwise_xor : public range_operator
diff --git a/gcc/range-op.cc b/gcc/range-op.cc
index d959a3e93dce81cd0d8832bde4f8082e64e8be1b..13ba973a08da92ebd7c39f1ae5cd12ac841dfc3d 100644
--- a/gcc/range-op.cc
+++ b/gcc/range-op.cc
@@ -4027,6 +4027,13 @@ operator_bitwise_not::op1_range (irange &r, tree type,
   return fold_range (r, type, lhs, op2);
 }
 
+void
+operator_bitwise_not::update_bitmask (irange &r, const irange &lh,
+				      const irange &rh) const
+{
+  update_known_bitmask (r, BIT_NOT_EXPR, lh, rh);
+}
+
 
 bool
 operator_cst::fold_range (irange &r, tree type ATTRIBUTE_UNUSED,