diff --git a/crypto/fipsmodule/bn/internal.h b/crypto/fipsmodule/bn/internal.h
index 85009a9..0bccf1e 100644
--- a/crypto/fipsmodule/bn/internal.h
+++ b/crypto/fipsmodule/bn/internal.h
@@ -652,6 +652,15 @@
 int bn_mod_inverse_secret_prime(BIGNUM *out, const BIGNUM *a, const BIGNUM *p,
                                 BN_CTX *ctx, const BN_MONT_CTX *mont_p);
 
+// BN_MONT_CTX_set_locked takes |lock| and checks whether |*pmont| is NULL. If
+// so, it creates a new |BN_MONT_CTX| and sets the modulus for it to |mod|. It
+// then stores it as |*pmont|. It returns one on success and zero on error. Note
+// this function assumes |mod| is public.
+//
+// If |*pmont| is already non-NULL then it does nothing and returns one.
+int BN_MONT_CTX_set_locked(BN_MONT_CTX **pmont, CRYPTO_MUTEX *lock,
+                           const BIGNUM *mod, BN_CTX *bn_ctx);
+
 
 // Low-level operations for small numbers.
 //
diff --git a/include/openssl/bn.h b/include/openssl/bn.h
index ff8eb5e..633bb9c 100644
--- a/include/openssl/bn.h
+++ b/include/openssl/bn.h
@@ -861,15 +861,6 @@
 OPENSSL_EXPORT BN_MONT_CTX *BN_MONT_CTX_copy(BN_MONT_CTX *to,
                                              const BN_MONT_CTX *from);
 
-// BN_MONT_CTX_set_locked takes |lock| and checks whether |*pmont| is NULL. If
-// so, it creates a new |BN_MONT_CTX| and sets the modulus for it to |mod|. It
-// then stores it as |*pmont|. It returns one on success and zero on error. Note
-// this function assumes |mod| is public.
-//
-// If |*pmont| is already non-NULL then it does nothing and returns one.
-int BN_MONT_CTX_set_locked(BN_MONT_CTX **pmont, CRYPTO_MUTEX *lock,
-                           const BIGNUM *mod, BN_CTX *bn_ctx);
-
 // BN_to_montgomery sets |ret| equal to |a| in the Montgomery domain. |a| is
 // assumed to be in the range [0, n), where |n| is the Montgomery modulus. It
 // returns one on success or zero on error.