diff --git a/src/Mayaqua/Microsoft.c b/src/Mayaqua/Microsoft.c
index 4579b301..8978e80e 100644
--- a/src/Mayaqua/Microsoft.c
+++ b/src/Mayaqua/Microsoft.c
@@ -4259,7 +4259,7 @@ UINT MsService(char *name, SERVICE_FUNCTION *start, SERVICE_FUNCTION *stop, UINT
 
 		if ((mode == SVC_MODE_INSTALL || mode == SVC_MODE_UNINSTALL || mode == SVC_MODE_START ||
 			mode == SVC_MODE_STOP || mode == SVC_MODE_SERVICE) &&
-			(ms->IsNt == false))
+			(IsNt() == false))
 		{
 			// Tried to use the command for the NT in non-WindowsNT system
 			MsgBox(NULL, MB_ICONSTOP, _UU("SVC_NT_ONLY"));
diff --git a/src/Mayaqua/Microsoft.h b/src/Mayaqua/Microsoft.h
index 0044bbda..69ca7715 100644
--- a/src/Mayaqua/Microsoft.h
+++ b/src/Mayaqua/Microsoft.h
@@ -170,7 +170,6 @@ typedef struct MS
 {
 	HINSTANCE hInst;
 	HINSTANCE hKernel32;
-	bool IsNt;
 	bool IsAdmin;
 	HANDLE hCurrentProcess;
 	UINT CurrentProcessId;