1 files changed, 2 insertions, 0 deletions
diff --git a/src/value.cc b/src/value.cc
index a3a05b6c..4529300a 100644
--- a/src/value.cc
+++ b/src/value.cc
@@ -983,6 +983,8 @@ void value_t::in_place_cast(type_t cast_type)
   if (type() == cast_type)
     return;
 
+  _dup();
+
   if (cast_type == BOOLEAN) {
     set_boolean(bool(*this));
     return;