diff --git a/src/main/java/istlab/KisoJikken/JCompiler.java b/src/main/java/istlab/KisoJikken/JCompiler.java
index f45d79d..e0713a7 100644
--- a/src/main/java/istlab/KisoJikken/JCompiler.java
+++ b/src/main/java/istlab/KisoJikken/JCompiler.java
@@ -37,9 +37,9 @@
         // System.out.println("== コンパイル開始 ==");
         ProcessBuilder processBuilder = new ProcessBuilder("bash", "-c",
                 "javac -encoding UTF-8 " + pkgname + "/*.java");
-        // if (App.isWindows) {
-        //     processBuilder = new ProcessBuilder("javac -encoding UTF-8 " + pkgname + "/*.java");
-        // }
+        if (App.isWindows) {
+            processBuilder = new ProcessBuilder("javac", "-encoding", "UTF-8" , pkgname + "/*.java");
+        }
         processBuilder.redirectErrorStream(true);
         JTAConsole con = new JTAConsole("(Compile) javac " + pkgname + "/*.java");
         con.setMainSrcByFileName(absolutePath);