diff --git a/cmake/modules/HandleLLVMOptions.cmake b/cmake/modules/HandleLLVMOptions.cmake
index 811ee922435..facf2f97fdf 100644
--- a/cmake/modules/HandleLLVMOptions.cmake
+++ b/cmake/modules/HandleLLVMOptions.cmake
@@ -24,13 +24,13 @@ if( LLVM_ENABLE_ASSERTIONS )
   if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" )
     add_definitions( -UNDEBUG )
     # Also remove /D NDEBUG to avoid MSVC warnings about conflicting defines.
-    set(REGEXP_NDEBUG "(^| )[/-]D *NDEBUG($| )")
-    string (REGEX REPLACE "${REGEXP_NDEBUG}" " "
-      CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
-    string (REGEX REPLACE "${REGEXP_NDEBUG}" " "
-      CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO}")
-    string (REGEX REPLACE "${REGEXP_NDEBUG}" " "
-      CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL}")
+    set(REGEXP_NDEBUG "(^| )[/-]D *NDEBUG($| )")
+    string (REGEX REPLACE "${REGEXP_NDEBUG}" " "
+      CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
+    string (REGEX REPLACE "${REGEXP_NDEBUG}" " "
+      CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO}")
+    string (REGEX REPLACE "${REGEXP_NDEBUG}" " "
+      CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL}")
   endif()
 else()
   if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE" )