diff --git a/OpenVPNAdapter.podspec b/OpenVPNAdapter.podspec
index 472de64..a910253 100644
--- a/OpenVPNAdapter.podspec
+++ b/OpenVPNAdapter.podspec
@@ -98,7 +98,7 @@ Pod::Spec.new do |s|
     client.source_files = "#{client_path}/library/*.{mm}", "#{client_path}/include/*.{hpp}"
     client.private_header_files = "#{client_path}/include/*.{hpp}"
 
-    client.compiler_flags = "-DUSE_ASIO", "-DUSE_ASIO_THREADLOCAL", "-DASIO_STANDALONE", "-DASIO_NO_DEPRECATED", "-DASIO_HAS_STD_STRING_VIEW", "-DHAVE_LZ4", "-DUSE_MBEDTLS", "-DOPENVPN_FORCE_TUN_NULL", "-DUSE_TUN_BUILDER"
+    client.compiler_flags = "-x objective-c++", "-DUSE_ASIO", "-DUSE_ASIO_THREADLOCAL", "-DASIO_STANDALONE", "-DASIO_NO_DEPRECATED", "-DASIO_HAS_STD_STRING_VIEW", "-DHAVE_LZ4", "-DUSE_MBEDTLS", "-DOPENVPN_FORCE_TUN_NULL", "-DUSE_TUN_BUILDER"
   end
 
 end