diff --git a/package.json b/package.json
index 0ce58ce..cb0d26b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
    "name": "@hibas123/logging",
-   "version": "2.4.2",
+   "version": "2.4.3",
    "description": "",
    "main": "out/index.js",
    "types": "out/index.d.ts",
diff --git a/src/base.ts b/src/base.ts
index b320156..1e3f4fc 100644
--- a/src/base.ts
+++ b/src/base.ts
@@ -334,7 +334,11 @@ export class LoggingBase {
          }
       }
 
-      if (PROJECT_ROOT && file_raw.file.startsWith(PROJECT_ROOT)) {
+      if (
+         PROJECT_ROOT &&
+         file_raw.file &&
+         file_raw.file.startsWith(PROJECT_ROOT)
+      ) {
          let newF = file_raw.file.substring(PROJECT_ROOT.length);
 
          if (newF.startsWith("/") || newF.startsWith("\\"))
@@ -342,7 +346,9 @@ export class LoggingBase {
 
          file_raw.file = newF;
       }
-      let file = `${file_raw.file}:${file_raw.line}:${file_raw.column || 0}`;
+      let file = `${file_raw.file || "<unknown>"}:${file_raw.line}:${
+         file_raw.column || 0
+      }`;
 
       let type_str = LoggingTypes[type].toUpperCase().padEnd(5, " ");
       let type_format: Format[] = [];