diff --git a/lib/Sources/OptionSource.ts b/lib/Sources/OptionSource.ts
index 81661fd..95bb90f 100644
--- a/lib/Sources/OptionSource.ts
+++ b/lib/Sources/OptionSource.ts
@@ -19,7 +19,7 @@ export abstract class OptionSource {
       opt.filled = true;
     }
     catch (e) {
-      // could not assing
+      // could not assign
     }
   }
 }