diff --git a/crypto/bn/bn_nist.c b/crypto/bn/bn_nist.c
index 17881233a4ae5e7c6edc5af158ba621cbf14bb82..ad3cc6b85cbe2adef885897cc93d0c4a51e2b465 100644
--- a/crypto/bn/bn_nist.c
+++ b/crypto/bn/bn_nist.c
@@ -184,7 +184,7 @@ static const BN_ULONG _nist_p_521_sqr[] = {
 # error "unsupported BN_BITS2"
 #endif
 
-static const BIGNUM _bignum_nist_p_192 = {
+static const BIGNUM ossl_bignum_nist_p_192 = {
     (BN_ULONG *)_nist_p_192[0],
     BN_NIST_192_TOP,
     BN_NIST_192_TOP,
@@ -192,7 +192,7 @@ static const BIGNUM _bignum_nist_p_192 = {
     BN_FLG_STATIC_DATA
 };
 
-static const BIGNUM _bignum_nist_p_224 = {
+static const BIGNUM ossl_bignum_nist_p_224 = {
     (BN_ULONG *)_nist_p_224[0],
     BN_NIST_224_TOP,
     BN_NIST_224_TOP,
@@ -200,7 +200,7 @@ static const BIGNUM _bignum_nist_p_224 = {
     BN_FLG_STATIC_DATA
 };
 
-static const BIGNUM _bignum_nist_p_256 = {
+static const BIGNUM ossl_bignum_nist_p_256 = {
     (BN_ULONG *)_nist_p_256[0],
     BN_NIST_256_TOP,
     BN_NIST_256_TOP,
@@ -208,7 +208,7 @@ static const BIGNUM _bignum_nist_p_256 = {
     BN_FLG_STATIC_DATA
 };
 
-static const BIGNUM _bignum_nist_p_384 = {
+static const BIGNUM ossl_bignum_nist_p_384 = {
     (BN_ULONG *)_nist_p_384[0],
     BN_NIST_384_TOP,
     BN_NIST_384_TOP,
@@ -216,7 +216,7 @@ static const BIGNUM _bignum_nist_p_384 = {
     BN_FLG_STATIC_DATA
 };
 
-static const BIGNUM _bignum_nist_p_521 = {
+static const BIGNUM ossl_bignum_nist_p_521 = {
     (BN_ULONG *)_nist_p_521,
     BN_NIST_521_TOP,
     BN_NIST_521_TOP,
@@ -226,27 +226,27 @@ static const BIGNUM _bignum_nist_p_521 = {
 
 const BIGNUM *BN_get0_nist_prime_192(void)
 {
-    return &_bignum_nist_p_192;
+    return &ossl_bignum_nist_p_192;
 }
 
 const BIGNUM *BN_get0_nist_prime_224(void)
 {
-    return &_bignum_nist_p_224;
+    return &ossl_bignum_nist_p_224;
 }
 
 const BIGNUM *BN_get0_nist_prime_256(void)
 {
-    return &_bignum_nist_p_256;
+    return &ossl_bignum_nist_p_256;
 }
 
 const BIGNUM *BN_get0_nist_prime_384(void)
 {
-    return &_bignum_nist_p_384;
+    return &ossl_bignum_nist_p_384;
 }
 
 const BIGNUM *BN_get0_nist_prime_521(void)
 {
-    return &_bignum_nist_p_521;
+    return &ossl_bignum_nist_p_521;
 }
 
 static void nist_cp_bn_0(BN_ULONG *dst, const BN_ULONG *src, int top, int max)
@@ -328,16 +328,16 @@ int BN_nist_mod_192(BIGNUM *r, const BIGNUM *a, const BIGNUM *field,
     } buf;
     BN_ULONG c_d[BN_NIST_192_TOP], *res;
     PTR_SIZE_INT mask;
-    static const BIGNUM _bignum_nist_p_192_sqr = {
+    static const BIGNUM ossl_bignum_nist_p_192_sqr = {
         (BN_ULONG *)_nist_p_192_sqr,
         OSSL_NELEM(_nist_p_192_sqr),
         OSSL_NELEM(_nist_p_192_sqr),
         0, BN_FLG_STATIC_DATA
     };
 
-    field = &_bignum_nist_p_192; /* just to make sure */
+    field = &ossl_bignum_nist_p_192; /* just to make sure */
 
-    if (BN_is_negative(a) || BN_ucmp(a, &_bignum_nist_p_192_sqr) >= 0)
+    if (BN_is_negative(a) || BN_ucmp(a, &ossl_bignum_nist_p_192_sqr) >= 0)
         return BN_nnmod(r, a, field, ctx);
 
     i = BN_ucmp(field, a);
@@ -473,16 +473,16 @@ int BN_nist_mod_224(BIGNUM *r, const BIGNUM *a, const BIGNUM *field,
         bn_addsub_f f;
         PTR_SIZE_INT p;
     } u;
-    static const BIGNUM _bignum_nist_p_224_sqr = {
+    static const BIGNUM ossl_bignum_nist_p_224_sqr = {
         (BN_ULONG *)_nist_p_224_sqr,
         OSSL_NELEM(_nist_p_224_sqr),
         OSSL_NELEM(_nist_p_224_sqr),
         0, BN_FLG_STATIC_DATA
     };
 
-    field = &_bignum_nist_p_224; /* just to make sure */
+    field = &ossl_bignum_nist_p_224; /* just to make sure */
 
-    if (BN_is_negative(a) || BN_ucmp(a, &_bignum_nist_p_224_sqr) >= 0)
+    if (BN_is_negative(a) || BN_ucmp(a, &ossl_bignum_nist_p_224_sqr) >= 0)
         return BN_nnmod(r, a, field, ctx);
 
     i = BN_ucmp(field, a);
@@ -654,16 +654,16 @@ int BN_nist_mod_256(BIGNUM *r, const BIGNUM *a, const BIGNUM *field,
         bn_addsub_f f;
         PTR_SIZE_INT p;
     } u;
-    static const BIGNUM _bignum_nist_p_256_sqr = {
+    static const BIGNUM ossl_bignum_nist_p_256_sqr = {
         (BN_ULONG *)_nist_p_256_sqr,
         OSSL_NELEM(_nist_p_256_sqr),
         OSSL_NELEM(_nist_p_256_sqr),
         0, BN_FLG_STATIC_DATA
     };
 
-    field = &_bignum_nist_p_256; /* just to make sure */
+    field = &ossl_bignum_nist_p_256; /* just to make sure */
 
-    if (BN_is_negative(a) || BN_ucmp(a, &_bignum_nist_p_256_sqr) >= 0)
+    if (BN_is_negative(a) || BN_ucmp(a, &ossl_bignum_nist_p_256_sqr) >= 0)
         return BN_nnmod(r, a, field, ctx);
 
     i = BN_ucmp(field, a);
@@ -900,16 +900,16 @@ int BN_nist_mod_384(BIGNUM *r, const BIGNUM *a, const BIGNUM *field,
         bn_addsub_f f;
         PTR_SIZE_INT p;
     } u;
-    static const BIGNUM _bignum_nist_p_384_sqr = {
+    static const BIGNUM ossl_bignum_nist_p_384_sqr = {
         (BN_ULONG *)_nist_p_384_sqr,
         OSSL_NELEM(_nist_p_384_sqr),
         OSSL_NELEM(_nist_p_384_sqr),
         0, BN_FLG_STATIC_DATA
     };
 
-    field = &_bignum_nist_p_384; /* just to make sure */
+    field = &ossl_bignum_nist_p_384; /* just to make sure */
 
-    if (BN_is_negative(a) || BN_ucmp(a, &_bignum_nist_p_384_sqr) >= 0)
+    if (BN_is_negative(a) || BN_ucmp(a, &ossl_bignum_nist_p_384_sqr) >= 0)
         return BN_nnmod(r, a, field, ctx);
 
     i = BN_ucmp(field, a);
@@ -1158,16 +1158,16 @@ int BN_nist_mod_521(BIGNUM *r, const BIGNUM *a, const BIGNUM *field,
     int top = a->top, i;
     BN_ULONG *r_d, *a_d = a->d, t_d[BN_NIST_521_TOP], val, tmp, *res;
     PTR_SIZE_INT mask;
-    static const BIGNUM _bignum_nist_p_521_sqr = {
+    static const BIGNUM ossl_bignum_nist_p_521_sqr = {
         (BN_ULONG *)_nist_p_521_sqr,
         OSSL_NELEM(_nist_p_521_sqr),
         OSSL_NELEM(_nist_p_521_sqr),
         0, BN_FLG_STATIC_DATA
     };
 
-    field = &_bignum_nist_p_521; /* just to make sure */
+    field = &ossl_bignum_nist_p_521; /* just to make sure */
 
-    if (BN_is_negative(a) || BN_ucmp(a, &_bignum_nist_p_521_sqr) >= 0)
+    if (BN_is_negative(a) || BN_ucmp(a, &ossl_bignum_nist_p_521_sqr) >= 0)
         return BN_nnmod(r, a, field, ctx);
 
     i = BN_ucmp(field, a);
@@ -1225,15 +1225,15 @@ int BN_nist_mod_521(BIGNUM *r, const BIGNUM *a, const BIGNUM *field,
 
 int (*BN_nist_mod_func(const BIGNUM *p)) (BIGNUM *r, const BIGNUM *a,
                                           const BIGNUM *field, BN_CTX *ctx) {
-    if (BN_ucmp(&_bignum_nist_p_192, p) == 0)
+    if (BN_ucmp(&ossl_bignum_nist_p_192, p) == 0)
         return BN_nist_mod_192;
-    if (BN_ucmp(&_bignum_nist_p_224, p) == 0)
+    if (BN_ucmp(&ossl_bignum_nist_p_224, p) == 0)
         return BN_nist_mod_224;
-    if (BN_ucmp(&_bignum_nist_p_256, p) == 0)
+    if (BN_ucmp(&ossl_bignum_nist_p_256, p) == 0)
         return BN_nist_mod_256;
-    if (BN_ucmp(&_bignum_nist_p_384, p) == 0)
+    if (BN_ucmp(&ossl_bignum_nist_p_384, p) == 0)
         return BN_nist_mod_384;
-    if (BN_ucmp(&_bignum_nist_p_521, p) == 0)
+    if (BN_ucmp(&ossl_bignum_nist_p_521, p) == 0)
         return BN_nist_mod_521;
     return 0;
 }