diff --git a/contracts/sysio.bios/sysio.bios.abi b/contracts/sysio.bios/sysio.bios.abi
index ad6931b..0d65bca 100644
--- a/contracts/sysio.bios/sysio.bios.abi
+++ b/contracts/sysio.bios/sysio.bios.abi
@@ -84,10 +84,6 @@
                     "name": "max_transaction_net_usage",
                     "type": "uint32"
                 },
-                {
-                    "name": "base_per_transaction_net_usage",
-                    "type": "uint32"
-                },
                 {
                     "name": "net_usage_leeway",
                     "type": "uint32"
diff --git a/contracts/sysio.system/sysio.system.abi b/contracts/sysio.system/sysio.system.abi
index 9cfd6d9..5e57dbf 100644
--- a/contracts/sysio.system/sysio.system.abi
+++ b/contracts/sysio.system/sysio.system.abi
@@ -148,10 +148,6 @@
                     "name": "max_transaction_net_usage",
                     "type": "uint32"
                 },
-                {
-                    "name": "base_per_transaction_net_usage",
-                    "type": "uint32"
-                },
                 {
                     "name": "net_usage_leeway",
                     "type": "uint32"