diff --git a/src/dxb.c b/src/dxb.c
index fc453b1c..f55e4b76 100644
--- a/src/dxb.c
+++ b/src/dxb.c
@@ -660,8 +660,9 @@ __cold int dxb_setup(MDBX_env *env, const int lck_rc, const mdbx_mode_t mode_bit
       }
 
       if (env->flags & MDBX_RDONLY) {
-        if (filesize_before & (globals.sys_pagesize - 1)) {
-          ERROR("%s", "filesize should be rounded-up to system page");
+        if (filesize_before & (globals.sys_allocation_granularity - 1)) {
+          ERROR("filesize should be rounded-up to system allocation granularity %u",
+                globals.sys_allocation_granularity);
           return MDBX_WANNA_RECOVERY;
         }
         WARNING("%s", "ignore filesize mismatch in readonly-mode");