diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index c89109c9..4f37bd18 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -44,6 +44,9 @@ if(UNIX)
 
   if(${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
     add_definitions(-DUNIX_LINUX)
+    if("$ENV{USE_MUSL}" STREQUAL "YES")
+      add_definitions(-DUNIX_LINUX_MUSL)
+    endif()
   endif()
 
   if(${CMAKE_SYSTEM_NAME} STREQUAL "FreeBSD")
diff --git a/src/Mayaqua/Internat.c b/src/Mayaqua/Internat.c
index 71f476f4..98f96100 100644
--- a/src/Mayaqua/Internat.c
+++ b/src/Mayaqua/Internat.c
@@ -789,11 +789,11 @@ void InitInternational()
 	d = IconvWideToStrInternal();
 	if (d == (void *)-1)
 	{
-#ifdef	UNIX_MACOS
+#if defined (UNIX_MACOS) || defined (UNIX_LINUX_MUSL)
 		StrCpy(charset, sizeof(charset), "utf-8");
-#else	// UNIX_MACOS
+#else // defined (UNIX_MACOS) || defined (UNIX_LINUX_MUSL) 
 		StrCpy(charset, sizeof(charset), "EUCJP");
-#endif	// UNIX_MACOS
+#endif // defined (UNIX_MACOS) || defined (UNIX_LINUX_MUSL) 
 		d = IconvWideToStrInternal();
 		if (d == (void *)-1)
 		{