diff --git a/EmulatorPkg/Win/Host/WinHost.c b/EmulatorPkg/Win/Host/WinHost.c
index ee834dd1a8..e69e9b6dbc 100644
--- a/EmulatorPkg/Win/Host/WinHost.c
+++ b/EmulatorPkg/Win/Host/WinHost.c
@@ -190,7 +190,7 @@ SecPrint (
 
   va_start (Marker, Format);
 
-  _vsnprintf (Buffer, sizeof (Buffer), Format, Marker);
+  _vsnprintf_s (Buffer, sizeof (Buffer), sizeof (Buffer) - 1, Format, Marker);
 
   va_end (Marker);