diff --git a/cmake/AwsCFlags.cmake b/cmake/AwsCFlags.cmake
index 42d146e..813f56d 100644
--- a/cmake/AwsCFlags.cmake
+++ b/cmake/AwsCFlags.cmake
@@ -39,15 +39,6 @@ function(aws_set_common_properties target)
         # Since we want to be compatible with user builds using /volatile:iso, use it for the tests.
         list(APPEND AWS_C_FLAGS /volatile:iso)
 
-        string(TOUPPER "${CMAKE_BUILD_TYPE}" _CMAKE_BUILD_TYPE)
-        if(STATIC_CRT)
-            string(REPLACE "/MD" "/MT" _FLAGS "${CMAKE_C_FLAGS_${_CMAKE_BUILD_TYPE}}")
-        else()
-            string(REPLACE "/MT" "/MD" _FLAGS "${CMAKE_C_FLAGS_${_CMAKE_BUILD_TYPE}}")
-        endif()
-        string(REPLACE " " ";" _FLAGS "${_FLAGS}")
-        list(APPEND AWS_C_FLAGS "${_FLAGS}")
-
     else()
         list(APPEND AWS_C_FLAGS -Wall -Werror -Wstrict-prototypes)
 
