diff --git a/config/lyxinclude.m4 b/config/lyxinclude.m4
index 057caf491c..3a0a6f34c7 100644
--- a/config/lyxinclude.m4
+++ b/config/lyxinclude.m4
@@ -362,8 +362,9 @@ if test x$GXX = xyes; then
 	dnl the deprecated-register warning is very annoying with Qt4.x right now.
         AM_CXXFLAGS="$AM_CXXFLAGS -std=c++11 -Wno-deprecated-register";;
       *)
-        AM_CXXFLAGS="$AM_CXXFLAGS -std=c++11"
-        AS_CASE([$host], [*cygwin*], [AM_CXXFLAGS="$AM_CXXFLAGS -U__STRICT_ANSI__"]);;
+        AS_CASE([$host], [*cygwin*],
+                [AM_CXXFLAGS="$AM_CXXFLAGS -std=gnu++11"],
+                [AM_CXXFLAGS="$AM_CXXFLAGS -std=c++11"]);;
     esac
   fi