diff --git a/CMakeLists.txt b/CMakeLists.txt
index e00f3403..557756fc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -379,9 +379,9 @@ add_mdbx_option(MDBX_INSTALL_STATIC "Build and install libmdbx for static linkin
 add_mdbx_option(MDBX_BUILD_SHARED_LIBRARY "Build libmdbx as shared library (DLL)" ${BUILD_SHARED_LIBS})
 add_mdbx_option(MDBX_BUILD_TOOLS "Build MDBX tools (mdbx_chk/stat/dump/load/copy)" ${MDBX_BUILD_TOOLS_DEFAULT})
 add_mdbx_option(MDBX_TXN_CHECKOWNER "Checking transaction matches the calling thread inside libmdbx's API" ON)
-add_mdbx_option(MDBX_TXN_CHECKPID "Paranoid checking PID inside libmdbx's API" AUTO)
+add_mdbx_option(MDBX_ENV_CHECKPID "Paranoid checking PID inside libmdbx's API" AUTO)
 add_mdbx_option(MDBX_HUGE_TRANSACTIONS "Support for huge write-transactions" OFF)
-mark_as_advanced(MDBX_TXN_CHECKPID)
+mark_as_advanced(MDBX_ENV_CHECKPID)
 if(${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
   add_mdbx_option(MDBX_DISABLE_GNU_SOURCE "Don't use GNU/Linux libc extensions" OFF)
   mark_as_advanced(MDBX_DISABLE_GNU_SOURCE)
diff --git a/docs/_restrictions.md b/docs/_restrictions.md
index 5304a7c4..03c76cb9 100644
--- a/docs/_restrictions.md
+++ b/docs/_restrictions.md
@@ -56,7 +56,7 @@ It would be insane to call fork() and any MDBX-functions simultaneously
 from multiple threads. The best way is to prevent the presence of open
 MDBX-instances during `fork()`.
 
-The `MDBX_TXN_CHECKPID` build-time option, which is ON by default on
+The `MDBX_ENV_CHECKPID` build-time option, which is ON by default on
 non-Windows platforms (i.e. where `fork()` is available), enables PID
 checking at a few critical points. But this does not give any guarantees,
 but only allows you to detect such errors a little sooner. Depending on
diff --git a/src/config.h.in b/src/config.h.in
index 871944e1..414ac9e9 100644
--- a/src/config.h.in
+++ b/src/config.h.in
@@ -14,9 +14,9 @@
 /* Common */
 #cmakedefine01 MDBX_HUGE_TRANSACTIONS
 #cmakedefine01 MDBX_TXN_CHECKOWNER
-#cmakedefine MDBX_TXN_CHECKPID_AUTO
-#ifndef MDBX_TXN_CHECKPID_AUTO
-#cmakedefine01 MDBX_TXN_CHECKPID
+#cmakedefine MDBX_ENV_CHECKPID_AUTO
+#ifndef MDBX_ENV_CHECKPID_AUTO
+#cmakedefine01 MDBX_ENV_CHECKPID
 #endif
 #cmakedefine MDBX_LOCKING_AUTO
 #ifndef MDBX_LOCKING_AUTO
diff --git a/src/core.c b/src/core.c
index 977a8222..55fea942 100644
--- a/src/core.c
+++ b/src/core.c
@@ -5714,12 +5714,12 @@ __cold int mdbx_env_sync_ex(MDBX_env *env, int force, int nonblock) {
   if (unlikely(env->me_signature != MDBX_ME_SIGNATURE))
     return MDBX_EBADSIGN;
 
-#if MDBX_TXN_CHECKPID
+#if MDBX_ENV_CHECKPID
   if (unlikely(env->me_pid != mdbx_getpid())) {
     env->me_flags |= MDBX_FATAL_ERROR;
     return MDBX_PANIC;
   }
-#endif /* MDBX_TXN_CHECKPID */
+#endif /* MDBX_ENV_CHECKPID */
 
   return mdbx_env_sync_internal(env, force, nonblock);
 }
@@ -5896,12 +5896,12 @@ static int mdbx_txn_renew0(MDBX_txn *txn, unsigned flags) {
   MDBX_env *env = txn->mt_env;
   int rc;
 
-#if MDBX_TXN_CHECKPID
+#if MDBX_ENV_CHECKPID
   if (unlikely(env->me_pid != mdbx_getpid())) {
     env->me_flags |= MDBX_FATAL_ERROR;
     return MDBX_PANIC;
   }
-#endif /* MDBX_TXN_CHECKPID */
+#endif /* MDBX_ENV_CHECKPID */
 
   STATIC_ASSERT(sizeof(MDBX_reader) == 32);
 #if MDBX_LOCKING > 0
@@ -6264,10 +6264,10 @@ int mdbx_txn_begin(MDBX_env *env, MDBX_txn *parent, unsigned flags,
   if (unlikely(env->me_signature != MDBX_ME_SIGNATURE))
     return MDBX_EBADSIGN;
 
-#if MDBX_TXN_CHECKPID
+#if MDBX_ENV_CHECKPID
   if (unlikely(env->me_pid != mdbx_getpid()))
     env->me_flags |= MDBX_FATAL_ERROR;
-#endif /* MDBX_TXN_CHECKPID */
+#endif /* MDBX_ENV_CHECKPID */
 
   if (unlikely(env->me_flags & MDBX_FATAL_ERROR))
     return MDBX_PANIC;
@@ -6417,12 +6417,12 @@ int mdbx_txn_info(const MDBX_txn *txn, MDBX_txn_info *info, bool scan_rlt) {
     return MDBX_EINVAL;
 
   MDBX_env *const env = txn->mt_env;
-#if MDBX_TXN_CHECKPID
+#if MDBX_ENV_CHECKPID
   if (unlikely(env->me_pid != mdbx_getpid())) {
     env->me_flags |= MDBX_FATAL_ERROR;
     return MDBX_PANIC;
   }
-#endif /* MDBX_TXN_CHECKPID */
+#endif /* MDBX_ENV_CHECKPID */
 
   info->txn_id = txn->mt_txnid;
   info->txn_space_used = pgno2bytes(env, txn->mt_geo.next);
@@ -6588,12 +6588,12 @@ static int mdbx_txn_end(MDBX_txn *txn, unsigned mode) {
   MDBX_env *env = txn->mt_env;
   static const char *const names[] = MDBX_END_NAMES;
 
-#if MDBX_TXN_CHECKPID
+#if MDBX_ENV_CHECKPID
   if (unlikely(txn->mt_env->me_pid != mdbx_getpid())) {
     env->me_flags |= MDBX_FATAL_ERROR;
     return MDBX_PANIC;
   }
-#endif /* MDBX_TXN_CHECKPID */
+#endif /* MDBX_ENV_CHECKPID */
 
   mdbx_debug("%s txn %" PRIaTXN "%c %p on mdbenv %p, root page %" PRIaPGNO
              "/%" PRIaPGNO,
@@ -7781,12 +7781,12 @@ int mdbx_txn_commit(MDBX_txn *txn) {
   }
 
   MDBX_env *env = txn->mt_env;
-#if MDBX_TXN_CHECKPID
+#if MDBX_ENV_CHECKPID
   if (unlikely(env->me_pid != mdbx_getpid())) {
     env->me_flags |= MDBX_FATAL_ERROR;
     return MDBX_PANIC;
   }
-#endif /* MDBX_TXN_CHECKPID */
+#endif /* MDBX_ENV_CHECKPID */
 
   /* mdbx_txn_end() mode for a commit which writes nothing */
   unsigned end_mode =
@@ -8912,10 +8912,10 @@ mdbx_env_set_geometry(MDBX_env *env, intptr_t size_lower, intptr_t size_now,
   if (unlikely(env->me_signature != MDBX_ME_SIGNATURE))
     return MDBX_EBADSIGN;
 
-#if MDBX_TXN_CHECKPID
+#if MDBX_ENV_CHECKPID
   if (unlikely(env->me_pid != mdbx_getpid()))
     env->me_flags |= MDBX_FATAL_ERROR;
-#endif /* MDBX_TXN_CHECKPID */
+#endif /* MDBX_ENV_CHECKPID */
 
   if (unlikely(env->me_flags & MDBX_FATAL_ERROR))
     return MDBX_PANIC;
@@ -10431,14 +10431,14 @@ int __cold mdbx_env_close_ex(MDBX_env *env, int dont_sync) {
   if (unlikely(env->me_signature != MDBX_ME_SIGNATURE))
     return MDBX_EBADSIGN;
 
-#if MDBX_TXN_CHECKPID || !(defined(_WIN32) || defined(_WIN64))
-  /* Check the PID even if MDBX_TXN_CHECKPID=0 on non-Windows
+#if MDBX_ENV_CHECKPID || !(defined(_WIN32) || defined(_WIN64))
+  /* Check the PID even if MDBX_ENV_CHECKPID=0 on non-Windows
    * platforms (i.e. where fork() is available).
    * This is required to legitimize a call after fork()
    * from a child process, that should be allowed to free resources. */
   if (unlikely(env->me_pid != mdbx_getpid()))
     env->me_flags |= MDBX_FATAL_ERROR;
-#endif /* MDBX_TXN_CHECKPID */
+#endif /* MDBX_ENV_CHECKPID */
 
   if ((env->me_flags & (MDBX_RDONLY | MDBX_FATAL_ERROR)) == 0 && env->me_txn0) {
     if (env->me_txn0->mt_owner && env->me_txn0->mt_owner != mdbx_thread_self())
@@ -17053,12 +17053,12 @@ int __cold mdbx_reader_check(MDBX_env *env, int *dead) {
 int __cold mdbx_reader_check0(MDBX_env *env, int rdt_locked, int *dead) {
   mdbx_assert(env, rdt_locked >= 0);
 
-#if MDBX_TXN_CHECKPID
+#if MDBX_ENV_CHECKPID
   if (unlikely(env->me_pid != mdbx_getpid())) {
     env->me_flags |= MDBX_FATAL_ERROR;
     return MDBX_PANIC;
   }
-#endif /* MDBX_TXN_CHECKPID */
+#endif /* MDBX_ENV_CHECKPID */
 
   MDBX_lockinfo *const lck = env->me_lck;
   if (unlikely(lck == NULL)) {
@@ -18942,7 +18942,7 @@ __dll_export
 #if MDBX_HUGE_TRANSACTIONS
     " MDBX_HUGE_TRANSACTIONS=YES"
 #endif /* MDBX_HUGE_TRANSACTIONS */
-    " MDBX_TXN_CHECKPID=" MDBX_TXN_CHECKPID_CONFIG
+    " MDBX_ENV_CHECKPID=" MDBX_ENV_CHECKPID_CONFIG
     " MDBX_TXN_CHECKOWNER=" MDBX_TXN_CHECKOWNER_CONFIG
     " MDBX_64BIT_ATOMIC=" MDBX_64BIT_ATOMIC_CONFIG
     " MDBX_64BIT_CAS=" MDBX_64BIT_CAS_CONFIG
diff --git a/src/options.h b/src/options.h
index 3f4ddc12..a6e2a97c 100644
--- a/src/options.h
+++ b/src/options.h
@@ -58,20 +58,20 @@
 #endif /* MDBX_OSX_SPEED_INSTEADOF_DURABILITY */
 
 /** Controls checking PID against reuse DB environment after the fork() */
-#ifndef MDBX_TXN_CHECKPID
+#ifndef MDBX_ENV_CHECKPID
 #if defined(MADV_DONTFORK) || defined(_WIN32) || defined(_WIN64)
 /* PID check could be ommited:
  *  - on Linux when madvise(MADV_DONTFORK) is available. i.e. after the fork()
  *    mapped pages will not be available for child process.
  *  - in Windows where fork() not available. */
-#define MDBX_TXN_CHECKPID 0
+#define MDBX_ENV_CHECKPID 0
 #else
-#define MDBX_TXN_CHECKPID 1
+#define MDBX_ENV_CHECKPID 1
 #endif
-#define MDBX_TXN_CHECKPID_CONFIG "AUTO=" STRINGIFY(MDBX_TXN_CHECKPID)
+#define MDBX_ENV_CHECKPID_CONFIG "AUTO=" STRINGIFY(MDBX_ENV_CHECKPID)
 #else
-#define MDBX_TXN_CHECKPID_CONFIG STRINGIFY(MDBX_TXN_CHECKPID)
-#endif /* MDBX_TXN_CHECKPID */
+#define MDBX_ENV_CHECKPID_CONFIG STRINGIFY(MDBX_ENV_CHECKPID)
+#endif /* MDBX_ENV_CHECKPID */
 
 /** Controls checking transaction owner thread against misuse transactions from
  * other threads. */