diff --git a/src/core.c b/src/core.c
index 4f7b9b8a..5c836258 100644
--- a/src/core.c
+++ b/src/core.c
@@ -12780,6 +12780,22 @@ __cold int mdbx_env_open(MDBX_env *env, const char *pathname,
         goto bailout;
       }
     }
+#elif defined(__linux__) || defined(__gnu_linux__)
+    /* Temporary workaround for Linux 4.19 (at least) kernel's flaw.
+     * See https://github.com/erthink/libmdbx/issues/269 */
+    if ((flags & MDBX_WRITEMAP) == 0 &&
+        mdbx_linux_kernel_version < 0x05040000) {
+      if (flags & MDBX_ACCEDE)
+        flags |= MDBX_WRITEMAP;
+      else {
+        mdbx_debug_log(MDBX_LOG_ERROR, __func__, __LINE__,
+                       "Linux prior to 5.4 requires MDBX_WRITEMAP because "
+                       "of a flaw of unified page/buffer cache. "
+                       "See https://github.com/erthink/libmdbx/issues/269\n");
+        rc = ENOPROTOOPT;
+        goto bailout;
+      }
+    }
 #endif /* MDBX_MMAP_INCOHERENT_FILE_WRITE */
   }