diff --git a/programs/test/selftest.c b/programs/test/selftest.c
index 0210a19..edf3d52 100644
--- a/programs/test/selftest.c
+++ b/programs/test/selftest.c
@@ -211,7 +211,8 @@
 #endif
 #endif
 
-#if defined(POLARSSL_TIMING_C)
+/* Not stable enough on Windows and FreeBSD yet */
+#if __linux__ && defined(POLARSSL_TIMING_C)
     if( ( ret = timing_self_test( v ) ) != 0 )
         return( ret );
 #endif