diff --git a/configure.ac b/configure.ac
index 9fab62e12..ffe6b4697 100644
--- a/configure.ac
+++ b/configure.ac
@@ -140,6 +140,7 @@ dnl End of has_mono = true
 else
 dnl Check for .NET Framework
 AC_PATH_PROG(CSC, csc.exe, no)
+CSFLAGS="-nologo -platform:x86"
 GACUTIL_FLAGS=
 GENERATED_SOURCES=generated\\\\*.cs
 AM_CONDITIONAL(ENABLE_THREADCHECK, false)
@@ -174,14 +175,15 @@ PKG_CHECK_MODULES(GIO, gio-2.0 >= $GLIB_REQUIRED_VERSION)
 AC_SUBST(GIO_CFLAGS)
 AC_SUBST(GIO_LIBS)
 
-CSFLAGS="$DEBUG_FLAGS $WIN64DEFINES"
+CSFLAGS="$CSFLAGS $DEBUG_FLAGS $WIN64DEFINES"
+AC_SUBST(CSFLAGS)
+
 PKG_CHECK_MODULES(GLIB_2_31,
 	glib-2.0 >= 2.31,
 	HAVE_GLIB_2_31_OR_HIGHER=yes, HAVE_GLIB_2_31_OR_HIGHER=no)
 if test "x$HAVE_GLIB_2_31_OR_HIGHER" = "xno" ; then
 	CSFLAGS="$CSFLAGS -define:ENABLE_GTHREAD_INIT"
 fi
-AC_SUBST(CSFLAGS)
 
 PKG_CHECK_MODULES(PANGO, pango)
 AC_SUBST(PANGO_CFLAGS)