diff --git a/core/math/SCsub b/core/math/SCsub
index aa98c34f798..0995298a4b1 100644
--- a/core/math/SCsub
+++ b/core/math/SCsub
@@ -22,7 +22,7 @@ if not has_module:
     env_thirdparty = env_math.Clone()
     env_thirdparty.disable_warnings()
     # Custom config file
-    env_thirdparty.Append(CPPDEFINES=[('MBEDTLS_CONFIG_FILE', "thirdparty/mbedtls/include/godot_core_mbedtls_config.h")])
+    env_thirdparty.Append(CPPDEFINES=[('MBEDTLS_CONFIG_FILE', '\\"thirdparty/mbedtls/include/godot_core_mbedtls_config.h\\"')])
     thirdparty_mbedtls_dir = "#thirdparty/mbedtls/library/"
     thirdparty_mbedtls_sources = [
         "aes.c",