diff --git a/src/osal.c b/src/osal.c
index b08ec899..72b19cfd 100644
--- a/src/osal.c
+++ b/src/osal.c
@@ -1451,10 +1451,9 @@ MDBX_INTERNAL_FUNC int mdbx_mresize(int flags, mdbx_mmap_t *map, size_t size,
   LARGE_INTEGER SectionSize;
   int err, rc = MDBX_SUCCESS;
 
-  if (!(flags & MDBX_RDONLY) && limit == map->limit && size > map->current) {
+  if (!(flags & MDBX_RDONLY) && limit == map->limit && size > map->current &&
+      /* workaround for Wine */ mdbx_NtExtendSection) {
     /* growth rw-section */
-    if (!mdbx_NtExtendSection)
-      return MDBX_UNABLE_EXTEND_MAPSIZE /* workaround for Wine */;
     SectionSize.QuadPart = size;
     status = mdbx_NtExtendSection(map->section, &SectionSize);
     if (!NT_SUCCESS(status))