diff --git a/mdbx.h b/mdbx.h
index 5c43ab89..ee6e21c7 100644
--- a/mdbx.h
+++ b/mdbx.h
@@ -1950,7 +1950,8 @@ enum MDBX_error_t {
   MDBX_EPERM = ERROR_INVALID_FUNCTION,
   MDBX_EINTR = ERROR_CANCELLED,
   MDBX_ENOFILE = ERROR_FILE_NOT_FOUND,
-  MDBX_EREMOTE = ERROR_REMOTE_STORAGE_MEDIA_ERROR
+  MDBX_EREMOTE = ERROR_REMOTE_STORAGE_MEDIA_ERROR,
+  MDBX_EDEADLK = ERROR_POSSIBLE_DEADLOCK
 #else /* Windows */
 #ifdef ENODATA
   MDBX_ENODATA = ENODATA,
@@ -1966,7 +1967,8 @@ enum MDBX_error_t {
   MDBX_EPERM = EPERM,
   MDBX_EINTR = EINTR,
   MDBX_ENOFILE = ENOENT,
-  MDBX_EREMOTE = ENOTBLK
+  MDBX_EREMOTE = ENOTBLK,
+  MDBX_EDEADLK = EDEADLK
 #endif /* !Windows */
 };
 #ifndef __cplusplus
diff --git a/src/lck-windows.c b/src/lck-windows.c
index d2354285..bc77150d 100644
--- a/src/lck-windows.c
+++ b/src/lck-windows.c
@@ -190,7 +190,7 @@ int osal_txn_lock(MDBX_env *env, bool dontwait) {
                  0xC0000194 /* STATUS_POSSIBLE_DEADLOCK / EXCEPTION_POSSIBLE_DEADLOCK */)
                     ? EXCEPTION_EXECUTE_HANDLER
                     : EXCEPTION_CONTINUE_SEARCH) {
-      return ERROR_POSSIBLE_DEADLOCK;
+      return MDBX_EDEADLK;
     }
   }
 
diff --git a/src/osal.c b/src/osal.c
index adffbabf..5559b204 100644
--- a/src/osal.c
+++ b/src/osal.c
@@ -536,7 +536,7 @@ MDBX_INTERNAL_FUNC int osal_fastmutex_acquire(osal_fastmutex_t *fastmutex) {
        0xC0000194 /* STATUS_POSSIBLE_DEADLOCK / EXCEPTION_POSSIBLE_DEADLOCK */)
           ? EXCEPTION_EXECUTE_HANDLER
           : EXCEPTION_CONTINUE_SEARCH) {
-    return ERROR_POSSIBLE_DEADLOCK;
+    return MDBX_EDEADLK;
   }
   return MDBX_SUCCESS;
 #else