diff --git a/Configurations/10-main.conf b/Configurations/10-main.conf
index 50756cb425..483bb50c40 100644
--- a/Configurations/10-main.conf
+++ b/Configurations/10-main.conf
@@ -797,7 +797,7 @@ my %targets = (
         inherit_from     => [ "linux-latomic" ],
         cflags           => add("-mabi=n32"),
         cxxflags         => add("-mabi=n32"),
-        bn_ops           => "RC4_CHAR",
+        bn_ops           => "RC4_CHAR SIXTY_FOUR_BIT",
         asm_arch         => 'mips64',
         perlasm_scheme   => "n32",
         multilib         => "32",