diff --git a/common/machihai.h b/common/machihai.h
index 92a79e6f..17098849 100644
--- a/common/machihai.h
+++ b/common/machihai.h
@@ -19,6 +19,7 @@ struct MachihaiInfo { // 待ち牌とかの情報を格納(chkFuriten関数用)
 	InfoByTile<MachihaiTileInfo> Machihai; // 待ち牌情報
 	int8_t MachihaiTotal; // 待ち牌の合計枚数
 	int8_t MachiMen; // 何面待ち？
+	MachihaiInfo() : FuritenFlag(), Machihai(), MachihaiTotal(), MachiMen() {}
 };
 static_assert(std::is_trivially_copyable<MachihaiInfo>::value, "MachihaiInfo is not trivially copyable");
 static_assert(std::is_standard_layout<MachihaiInfo>::value, "MachihaiInfo is not standard layout");
@@ -27,6 +28,10 @@ struct TileStatus { // gettilestatus用
 	bool isExistent, canFormQuad,
 		seqMidWait, seqDoubleSideWait, seqSingleSideWait,
 		formsPair, formsSequence, formsTriplet;
+	TileStatus() : isExistent(), canFormQuad(),
+		seqMidWait(), seqDoubleSideWait(), seqSingleSideWait(),
+		formsPair(), formsSequence(), formsTriplet()
+	{}
 };
 static_assert(std::is_trivially_copyable<TileStatus>::value, "TileStatus is not trivially copyable");
 static_assert(std::is_standard_layout<TileStatus>::value, "TileStatus is not standard layout");
diff --git a/common/tilecode.h b/common/tilecode.h
index 662e6a5c..a8b73efb 100644
--- a/common/tilecode.h
+++ b/common/tilecode.h
@@ -126,6 +126,7 @@ template <class T> class InfoByTile { // 牌ごとに指定した型による情
 	T& operator[](const int tile) {
 		return InfoByTile::operator[](static_cast<TileCode>(tile));
 	}
+	InfoByTile() : val() {}
 };
 
 template class InfoByTile<bool>;
diff --git a/common/version.h b/common/version.h
index fe140010..16cf2b31 100644
--- a/common/version.h
+++ b/common/version.h
@@ -2,13 +2,13 @@
 
 #define MIHAJONG_MAJOR_VER 2
 #define MIHAJONG_MINOR_VER 4
-#define MIHAJONG_PATCH_VER 1
-#define MIHAJONG_VER "2.4.1"
+#define MIHAJONG_PATCH_VER 2
+#define MIHAJONG_VER "2.4.2"
 
 #define MJCORE_MAJOR_VER 2
 #define MJCORE_MINOR_VER 4
-#define MJCORE_PATCH_VER 0
-#define MJCORE_VER "2.4.0"
+#define MJCORE_PATCH_VER 2
+#define MJCORE_VER "2.4.2"
 
 #define LOGGER_MAJOR_VER 2
 #define LOGGER_MINOR_VER 4
@@ -32,8 +32,8 @@
 
 #define GRAPHIC_MAJOR_VER 2
 #define GRAPHIC_MINOR_VER 4
-#define GRAPHIC_PATCH_VER 0
-#define GRAPHIC_VER "2.4.0"
+#define GRAPHIC_PATCH_VER 2
+#define GRAPHIC_VER "2.4.2"
 
 #define CONFIG_MAJOR_VER 2
 #define CONFIG_MINOR_VER 4
diff --git a/doc/history.md b/doc/history.md
index d09e47d0..ca91af15 100644
--- a/doc/history.md
+++ b/doc/history.md
@@ -5,6 +5,10 @@ Copyright (c) 2008-2013, 2019-2020 MihailJP
 
 バージョン履歴
 ---------------
+### [2.4.2] 2021年11月9日
+
+- Ver2.4.xでデータが正しく初期化されていなかったのを修正
+
 ### [2.4.1] 2021年11月9日
 
 - Ver2.4.0で瀬戸内三麻の実行ファイルがないのを修正
diff --git a/mjcore/yaku/yaku.h b/mjcore/yaku/yaku.h
index ff7bebc1..514da5f6 100644
--- a/mjcore/yaku/yaku.h
+++ b/mjcore/yaku/yaku.h
@@ -88,6 +88,10 @@ class yaku::yakuCalculator {
 		bool TsumoAgariFlag() const { // ツモアガリどうかのフラグ
 			return GameStat->TsumoAgariFlag;
 		}
+		MentsuAnalysis() :
+			player(), BasePoint(), GameStat(), Machi(), MianziDat(), isPinfu(),
+			TotalKezi(), TotalAnKezi(), TotalShunzi(), TotalAnShunzi(), TotalKangzi(), TotalAnKangzi(), TotalKaKangzi()
+		{}
 	};
 #ifdef MJCORE_EXPORTS
 	static_assert(std::is_trivially_copyable<MentsuAnalysis>::value, "MentsuAnalysis is not trivially copyable");