diff -urN wine-11.18-orig/dlls/ntdll/unix/virtual.c wine-11.18/dlls/ntdll/unix/virtual.c
--- wine-11.18-orig/dlls/ntdll/unix/virtual.c	2026-09-19 05:36:23 +0900
+++ wine-11.18/dlls/ntdll/unix/virtual.c	2026-09-19 17:24:38 +0900
@@ -4072,6 +4072,14 @@
 /* enable use of a large address space when allowed by the application */
 static void set_large_address_space(void)
 {
+    const char *force_laa_str;
+    int force_laa;
+    int is_laa;
+
+    force_laa_str = getenv("WINEFORCELARGEADDRESSAWARE");
+    force_laa = (force_laa_str != NULL && *force_laa_str != '\0');
+    is_laa = (force_laa || (main_image_info.ImageCharacteristics & IMAGE_FILE_LARGE_ADDRESS_AWARE));
+
     if (main_image_info.Machine == IMAGE_FILE_MACHINE_I386)
     {
         /* reserve the DOS area, and make it accessible (except the low 64K)
@@ -4091,7 +4099,7 @@
             if (use_aslr()) free_reserved_memory( 0, (char *)0x7ffe0000 );
 #endif
         }
-        else if (main_image_info.ImageCharacteristics & IMAGE_FILE_LARGE_ADDRESS_AWARE)
+        else if (is_laa)
         {
             user_space_wow_limit = limit_4g - 1;
             /* reserve space for top-down allocations; some apps break if the entire high 2G is available */
@@ -4101,7 +4109,7 @@
     }
     else
     {
-        if (!(main_image_info.ImageCharacteristics & IMAGE_FILE_LARGE_ADDRESS_AWARE)) return;
+        if (!is_laa) return;
         free_reserved_memory( (char *)0x80000000, address_space_limit );
     }
     user_space_limit = working_set_limit = address_space_limit;