diff --git a/compiler/driver/compiler_options.h b/compiler/driver/compiler_options.h
index 17b19dd..d2a90ec 100644
--- a/compiler/driver/compiler_options.h
+++ b/compiler/driver/compiler_options.h
@@ -54,6 +54,10 @@
   static const size_t kDefaultInlineDepthLimit = 3;
   static const size_t kDefaultInlineMaxCodeUnits = 18;
 
+  // Default inlining settings when the space filter is used.
+  static constexpr size_t kSpaceFilterInlineDepthLimit = 3;
+  static constexpr size_t kSpaceFilterInlineMaxCodeUnits = 10;
+
   CompilerOptions();
   ~CompilerOptions();