diff --git a/lib/filterx/expr-getattr.c b/lib/filterx/expr-getattr.c
index 8f6c4bd32..50d48341b 100644
--- a/lib/filterx/expr-getattr.c
+++ b/lib/filterx/expr-getattr.c
@@ -137,6 +137,7 @@ filterx_getattr_new(FilterXExpr *operand, FilterXString *attr_name)
   self->operand = operand;
 
   self->attr = (FilterXObject *) attr_name;
-
+  /* NOTE: name borrows the string value from the string object */
+  self->super.name = filterx_string_get_value_ref(self->attr, NULL);
   return &self->super;
 }
diff --git a/lib/filterx/expr-setattr.c b/lib/filterx/expr-setattr.c
index e814eef5f..e75ed8d92 100644
--- a/lib/filterx/expr-setattr.c
+++ b/lib/filterx/expr-setattr.c
@@ -185,6 +185,8 @@ filterx_nullv_setattr_new(FilterXExpr *object, FilterXString *attr_name, FilterX
 
   self->new_value = new_value;
   self->super.ignore_falsy_result = TRUE;
+  /* NOTE: name borrows the string value from the string object */
+  self->super.name = filterx_string_get_value_ref(self->attr, NULL);
   return &self->super;
 }
 
diff --git a/lib/filterx/expr-variable.c b/lib/filterx/expr-variable.c
index e3a101e5d..43696395b 100644
--- a/lib/filterx/expr-variable.c
+++ b/lib/filterx/expr-variable.c
@@ -191,6 +191,9 @@ filterx_variable_expr_new(FilterXString *name, FilterXVariableType type)
   self->variable_name = (FilterXObject *) name;
   self->handle = filterx_map_varname_to_handle(filterx_string_get_value_ref(self->variable_name, NULL), type);
 
+  /* NOTE: name borrows the string value from the string object */
+  self->super.name = filterx_string_get_value_ref(self->variable_name, NULL);
+
   return &self->super;
 }