diff --git a/src/coreclr/utilcode/executableallocator.cpp b/src/coreclr/utilcode/executableallocator.cpp
index 9536b673f53a51..7872954adc485c 100644
--- a/src/coreclr/utilcode/executableallocator.cpp
+++ b/src/coreclr/utilcode/executableallocator.cpp
@@ -259,7 +259,7 @@ bool ExecutableAllocator::Initialize()
     return true;
 }
 
-//#define ENABLE_CACHED_MAPPINGS
+#define ENABLE_CACHED_MAPPINGS
 
 void ExecutableAllocator::UpdateCachedMapping(BlockRW* pBlock)
 {