diff --git a/src/os/core/win32/os_core_win32.c b/src/os/core/win32/os_core_win32.c
index 70a518e9..2bc1c8c3 100644
--- a/src/os/core/win32/os_core_win32.c
+++ b/src/os/core/win32/os_core_win32.c
@@ -1565,8 +1565,8 @@ w32_entry_point_caller(int argc, WCHAR **wargv)
        str8_match(arg8, str8_lit("-large_pages"), StringMatchFlag_CaseInsensitive))
     {
       arena_default_flags        = ArenaFlag_LargePages;
-      arena_default_reserve_size = os_w32_state.system_info.large_page_size;
-      arena_default_commit_size  = os_w32_state.system_info.large_page_size;
+      arena_default_reserve_size = Max(MB(64), os_w32_state.system_info.large_page_size);
+      arena_default_commit_size  = arena_default_reserve_size;
     }
     argv[i] = (char *)arg8.str;
   }