Tighten up argument passing related to fn_market()

1 files changed, 3 insertions, 3 deletions

diff --git a/src/py_balance.cc b/src/py_balance.cc
index 38941832..2ae546f1 100644
--- a/src/py_balance.cc
+++ b/src/py_balance.cc
@@ -48,12 +48,12 @@ namespace {
     return balance.value(CURRENT_TIME());
   }
   boost::optional<balance_t> py_value_1(const balance_t& balance,
-                                        commodity_t& in_terms_of) {
+                                        const commodity_t * in_terms_of) {
     return balance.value(CURRENT_TIME(), in_terms_of);
   }
   boost::optional<balance_t> py_value_2(const balance_t& balance,
-                                        commodity_t& in_terms_of,
-                                        datetime_t& moment) {
+                                        const commodity_t * in_terms_of,
+                                        const datetime_t& moment) {
     return balance.value(moment, in_terms_of);
   }