diff --git a/src/Main.cpp b/src/Main.cpp
index 2d6db2a5..7bcd0bb4 100644
--- a/src/Main.cpp
+++ b/src/Main.cpp
@@ -38,8 +38,6 @@ static BOOL bActive = TRUE;
 static int windowWidth;
 static int windowHeight;
 
-static const char *mutex_name = "Doukutsu";
-
 #ifdef JAPANESE
 static const char *lpWindowName = "洞窟物語";	// "Cave Story"
 #else