diff --git a/modules/gdscript/SCsub b/modules/gdscript/SCsub
index 8108df98b..d84c0f3c4 100644
--- a/modules/gdscript/SCsub
+++ b/modules/gdscript/SCsub
@@ -16,4 +16,6 @@ if env["tools"]:
     else:
         # Using a define in the disabled case, to avoid having an extra define
         # in regular builds where all modules are enabled.
-        env_gdscript.Append(CPPDEFINES=["GDSCRIPT_NO_LSP"])
\ No newline at end of file
+        env_gdscript.Append(CPPDEFINES=["GDSCRIPT_NO_LSP"])
+        # Also needed in main env to unexpose --lsp-port option.
+        env.Append(CPPDEFINES=["GDSCRIPT_NO_LSP"])
\ No newline at end of file