diff --git a/src/register/ledger-core/split-register-layout.c b/src/register/ledger-core/split-register-layout.c
index 5903729e27..2912f426a7 100644
--- a/src/register/ledger-core/split-register-layout.c
+++ b/src/register/ledger-core/split-register-layout.c
@@ -544,7 +544,7 @@ gnc_split_register_layout_add_cells (SplitRegister *reg,
   gnc_register_add_cell (layout,
                          RATE_CELL,
                          PRICE_CELL_TYPE_NAME,
-                         "",
+                         NULL,
                          CELL_ALIGN_RIGHT,
                          FALSE,
                          FALSE);