diff --git a/runtime/runtime.cc b/runtime/runtime.cc
index fba9d37..fe97394 100644
--- a/runtime/runtime.cc
+++ b/runtime/runtime.cc
@@ -947,10 +947,8 @@
   if (IsCompiler() && Is64BitInstructionSet(kRuntimeISA)) {
     // 4gb, no malloc. Explanation in header.
     low_4gb_arena_pool_.reset(new ArenaPool(false, true));
-    linear_alloc_.reset(new LinearAlloc(low_4gb_arena_pool_.get()));
-  } else {
-    linear_alloc_.reset(new LinearAlloc(arena_pool_.get()));
   }
+  linear_alloc_.reset(CreateLinearAlloc());
 
   BlockSignals();
   InitPlatformSignalHandlers();
@@ -1791,4 +1789,10 @@
   return verify_ == verifier::VerifyMode::kSoftFail;
 }
 
+LinearAlloc* Runtime::CreateLinearAlloc() {
+  return (IsCompiler() && Is64BitInstructionSet(kRuntimeISA))
+      ? new LinearAlloc(low_4gb_arena_pool_.get())
+      : new LinearAlloc(arena_pool_.get());
+}
+
 }  // namespace art