diff --git a/README.md b/README.md
index 8a0ece65..bc9e1d05 100644
--- a/README.md
+++ b/README.md
@@ -272,7 +272,8 @@ the Wine prefix. Removing the option will revert to the previous behavior.
 | <tt>nod3d10</tt>      | <tt>PROTON_NO_D3D10</tt>       | Disable <tt>d3d10.dll</tt> and <tt>dxgi.dll</tt>, for d3d10 games which can fall back to and run better with d3d9. |
 | <tt>noesync</tt>      | <tt>PROTON_NO_ESYNC</tt>       | Do not use eventfd-based in-process synchronization primitives. |
 | <tt>nofsync</tt>      | <tt>PROTON_NO_FSYNC</tt>       | Do not use futex-based in-process synchronization primitives. (Automatically disabled on systems with no `FUTEX_WAIT_MULTIPLE` support.) |
-| <tt>forcelgadd</tt>   | <tt>PROTON_FORCE_LARGE_ADDRESS_AWARE</tt> | Force Wine to enable the LARGE_ADDRESS_AWARE flag for all executables. |
+| <tt>forcelgadd</tt>   | <tt>PROTON_FORCE_LARGE_ADDRESS_AWARE</tt> | Force Wine to enable the LARGE_ADDRESS_AWARE flag for all executables. Enabled by default. |
+| <tt>noforcelgadd</tt> |                                | Disable forcelgadd. If both this and `forcelgadd` are set, enabled wins. |
 | <tt>oldglstr</tt>     | <tt>PROTON_OLD_GL_STRING</tt>  | Set some driver overrides to limit the length of the GL extension string, for old games that crash on very long extension strings. |
 |                       | <tt>WINE_FULLSCREEN_INTEGER_SCALING</tt> | Enable integer scaling mode, to give sharp pixels when upscaling. |
 | <tt>d9vk</tt>         | <tt>PROTON_USE_D9VK</tt>       | **Note: Obsoleted in Proton 5.0.** In older versions, use Vulkan-based DXVK instead of OpenGL-based wined3d for d3d9. |
diff --git a/proton b/proton
index 860004ef..59b2b0cd 100755
--- a/proton
+++ b/proton
@@ -377,7 +377,10 @@ class Session:
             self.compat_config = set(os.environ["STEAM_COMPAT_CONFIG"].split(","))
         else:
             self.compat_config = set()
-        self.compat_config.add("forcelgadd")
+
+        #turn forcelgadd on by default unless it is disabled in compat config
+        if not "noforcelgadd" in self.compat_config:
+            self.compat_config.add("forcelgadd")
 
     def init_wine(self):
         if "HOST_LC_ALL" in self.env and len(self.env["HOST_LC_ALL"]) > 0: