diff --git a/Configuration/Framework.xcconfig b/Configuration/Framework.xcconfig
index c929a26..f3fb7ad 100755
--- a/Configuration/Framework.xcconfig
+++ b/Configuration/Framework.xcconfig
@@ -12,5 +12,5 @@ LIBRARY_SEARCH_PATHS[sdk=iphonesimulator*] = "$(VENDORS_PATH)/lz4/lib/sim" "$(VE
 LIBRARY_SEARCH_PATHS[sdk=iphoneos*] = "$(VENDORS_PATH)/lz4/lib/ios" "$(VENDORS_PATH)/mbedtls/lib/ios"
 LIBRARY_SEARCH_PATHS[sdk=macosx*] = "$(VENDORS_PATH)/lz4/lib/macos" "$(VENDORS_PATH)/mbedtls/lib/macos"
 OTHER_LDFLAGS = -lmbedtls -lmbedx509 -lmbedcrypto -llz4
-OTHER_CPLUSPLUSFLAGS = $(OTHER_CFLAGS) -DUSE_ASIO -DASIO_STANDALONE -DASIO_NO_DEPRECATED -DHAVE_LZ4 -DUSE_MBEDTLS -DOPENVPN_FORCE_TUN_NULL -DUSE_TUN_BUILDER
+OTHER_CPLUSPLUSFLAGS = $(OTHER_CFLAGS) -DUSE_ASIO -DUSE_ASIO_THREADLOCAL -DASIO_STANDALONE -DASIO_NO_DEPRECATED -DHAVE_LZ4 -DUSE_MBEDTLS -DOPENVPN_FORCE_TUN_NULL -DUSE_TUN_BUILDER
 GCC_WARN_64_TO_32_BIT_CONVERSION = NO