diff --git a/dist/bitburner.d.ts b/dist/bitburner.d.ts
index 06c6e1445..461c199dc 100644
--- a/dist/bitburner.d.ts
+++ b/dist/bitburner.d.ts
@@ -3905,7 +3905,7 @@ export declare interface NS extends Singularity {
      * @param data - Data to write.
      * @returns True if the data is successfully written to the port, and false otherwise.
      */
-    tryWritePort(port: number, data: string[] | number): Promise<boolean>;
+    tryWritePort(port: number, data: string | number): Promise<boolean>;
 
     /**
      * Read content of a file.
diff --git a/src/NetscriptFunctions.ts b/src/NetscriptFunctions.ts
index 339960b55..0fb3758b0 100644
--- a/src/NetscriptFunctions.ts
+++ b/src/NetscriptFunctions.ts
@@ -1841,6 +1841,12 @@ export function NetscriptFunctions(workerScript: WorkerScript): NS {
     },
     tryWritePort: function (port: any, data: any = ""): any {
       updateDynamicRam("tryWritePort", getRamCost(Player, "tryWritePort"));
+      if ((typeof data !== "string" && typeof data !== "number") || isNS(data)) {
+        throw makeRuntimeErrorMsg(
+          "writePort",
+          `Trying to write invalid data to a port: only strings and numbers are valid.`,
+        );
+      }
       if (!isNaN(port)) {
         port = Math.round(port);
         if (port < 1 || port > CONSTANTS.NumNetscriptPorts) {
diff --git a/src/ScriptEditor/NetscriptDefinitions.d.ts b/src/ScriptEditor/NetscriptDefinitions.d.ts
index 6e613ba80..e45302614 100644
--- a/src/ScriptEditor/NetscriptDefinitions.d.ts
+++ b/src/ScriptEditor/NetscriptDefinitions.d.ts
@@ -5555,7 +5555,7 @@ export interface NS extends Singularity {
    * @param data - Data to write.
    * @returns True if the data is successfully written to the port, and false otherwise.
    */
-  tryWritePort(port: number, data: string[] | number): Promise<boolean>;
+  tryWritePort(port: number, data: string | number): Promise<boolean>;
 
   /**
    * Read content of a file.