diff --git a/src/Netscript/RamCostGenerator.ts b/src/Netscript/RamCostGenerator.ts
index 9c49d94bd..8ce6b3c4c 100644
--- a/src/Netscript/RamCostGenerator.ts
+++ b/src/Netscript/RamCostGenerator.ts
@@ -356,6 +356,7 @@ export const RamCosts: IMap<any> = {
   print: 0,
   printf: 0,
   tprint: 0,
+  tprintf: 0,
   clearLog: 0,
   disableLog: 0,
   enableLog: 0,