diff --git a/libtfm.symbols b/libtfm.symbols
index 4147c5d..8a65c81 100644
--- a/libtfm.symbols
+++ b/libtfm.symbols
@@ -16,6 +16,7 @@ fp_gcd
 fp_ident
 fp_invmod
 fp_isprime
+fp_isprime_ex
 fp_lcm
 fp_lshd
 fp_mod