diff --git a/src/aws-cpp-sdk-core/CMakeLists.txt b/src/aws-cpp-sdk-core/CMakeLists.txt
index c44546b0e..b66888362 100644
--- a/src/aws-cpp-sdk-core/CMakeLists.txt
+++ b/src/aws-cpp-sdk-core/CMakeLists.txt
@@ -113,13 +113,8 @@ if(ENABLE_CURL_CLIENT)
     int main() {
     CURL* handle = curl_easy_init();
     return curl_easy_setopt(handle, CURLOPT_PROXY_SSLCERT, \"client.pem\"); }")
-    if (CMAKE_CROSSCOMPILING)
-        check_c_source_compiles("${CHECK_CURL_HAS_H2}" CURL_HAS_H2)
-        check_c_source_compiles("${CHECK_CURL_HAS_TLS_PROXY}" CURL_HAS_TLS_PROXY)
-    else()
-        check_c_source_runs("${CHECK_CURL_HAS_H2}" CURL_HAS_H2)
-        check_c_source_runs("${CHECK_CURL_HAS_TLS_PROXY}" CURL_HAS_TLS_PROXY)
-    endif()
+    set(CURL_HAS_H2 OFF)
+    set(CURL_HAS_TLS_PROXY ON)
 elseif(ENABLE_WINDOWS_CLIENT)
     # NOTE: HTTP/2 is not supported when using IXML_HTTP_REQUEST_2
     if(USE_IXML_HTTP_REQUEST_2)