diff --git a/src/utils/converter.ts b/src/utils/converter.ts
index c7ec4f9..e21711f 100644
--- a/src/utils/converter.ts
+++ b/src/utils/converter.ts
@@ -57,13 +57,28 @@ export default class Converter
     }
 
     constructor(
-        private readonly _path: string,
+        path: string,
         private readonly _initFile: string,
         private readonly _options: Options,
         private readonly _logger: Logger,
-    ) {}
+    ) {
+        if (process.platform === 'win32') {
+            // TODO:
+            // On Windows, when passing the path of input file to makeinfo,
+            // using backslashes in path name breaks some other command line
+            // options (notably, -I).
+            // Not sure if this is a bug of makeinfo, or perl, or neither.
+            // We should look into this issue sometime later.
+            this._path = path.replace(/\\/g, '/');
+        } else {
+            this._path = path;
+        }
+    }
+
+    private readonly _path: string;
 
     private _addIncludePaths(paths: readonly string[], options: string[]) {
+        if (paths.length === 0) return;
         const separator = process.platform === 'win32' ? ';' : ':';
         options.push('-I', paths.join(separator));
     }