diff --git a/storage/rocksdb/CMakeLists.txt b/storage/rocksdb/CMakeLists.txt
index 0f99f19348e..b37755f1510 100644
--- a/storage/rocksdb/CMakeLists.txt
+++ b/storage/rocksdb/CMakeLists.txt
@@ -280,8 +280,6 @@ IF(MSVC)
   # additional const qualifiers to parameters of the overriden virtual functions
   # This creates a lot of warnings, that we silence here.
   ADD_DEFINITIONS(/wd4373)
-  # Some checks in C++ runtime that make debug build much slower
-  ADD_DEFINITIONS(-D_ITERATOR_DEBUG_LEVEL=0)
 
     # Temporarily disable "conversion from size_t .." warnings
   IF(CMAKE_SIZEOF_VOID_P EQUAL 8)