diff --git a/cmake/UseVala.cmake b/cmake/UseVala.cmake
index 436a03ce..822ac005 100644
--- a/cmake/UseVala.cmake
+++ b/cmake/UseVala.cmake
@@ -146,9 +146,9 @@ function(vala_precompile output)
     endforeach(pkg ${ARGS_PACKAGES})
 
     set(vala_define_opts "")
-    foreach(def ${ARGS_DEFINTIONS})
+    foreach(def ${ARGS_DEFINITIONS})
         list(APPEND vala_define_opts "--define=${def}")
-    endforeach(def ${ARGS_DEFINTIONS})
+    endforeach(def ${ARGS_DEFINITIONS})
 
     set(custom_vapi_arguments "")
     if(ARGS_CUSTOM_VAPIS)
@@ -212,6 +212,7 @@ function(vala_precompile output)
                 ${VALA_EXECUTABLE}
             ARGS
                 --fast-vapi ${fast_vapi_file}
+                ${vala_define_opts}
                 ${ARGS_OPTIONS}
                 ${VALAC_FLAGS}
                 ${in_file}
@@ -326,4 +327,4 @@ function(vala_precompile output)
         )
     endif(ARGS_FAST_VAPI)
     set(${output} ${out_files} PARENT_SCOPE)
-endfunction(vala_precompile)
\ No newline at end of file
+endfunction(vala_precompile)
diff --git a/xmpp-vala/CMakeLists.txt b/xmpp-vala/CMakeLists.txt
index 5836f96f..57347282 100644
--- a/xmpp-vala/CMakeLists.txt
+++ b/xmpp-vala/CMakeLists.txt
@@ -6,6 +6,16 @@ find_packages(ENGINE_PACKAGES REQUIRED
     GObject
 )
 
+set(ENGINE_DEFINITIONS "")
+
+find_package(GIO)
+if(GIO_VERSION VERSION_GREATER "2.60")
+    message(STATUS "ALPN support enabled")
+    set(ENGINE_DEFINITIONS ALPN_SUPPORT)
+else()
+    message(STATUS "No ALPN support, needs GIO >= 2.60")
+endif()
+
 vala_precompile(ENGINE_VALA_C
 SOURCES
     "src/glib_fixes.vapi"
@@ -91,6 +101,8 @@ GENERATE_VAPI
     xmpp-vala
 GENERATE_HEADER
     xmpp-vala
+DEFINITIONS
+    ${ENGINE_DEFINITIONS}
 )
 
 add_custom_target(xmpp-vala-vapi
diff --git a/xmpp-vala/src/module/xep/0368_srv_records_tls.vala b/xmpp-vala/src/module/xep/0368_srv_records_tls.vala
index 3d0708fb..5a2a4559 100644
--- a/xmpp-vala/src/module/xep/0368_srv_records_tls.vala
+++ b/xmpp-vala/src/module/xep/0368_srv_records_tls.vala
@@ -39,6 +39,9 @@ public class TlsConnectionProvider : ConnectionProvider {
             debug("Connecting to %s %i (tls)", srv_target.get_hostname(), srv_target.get_port());
             IOStream? io_stream = yield client.connect_to_host_async(srv_target.get_hostname(), srv_target.get_port());
             TlsConnection tls_connection = TlsClientConnection.new(io_stream, new NetworkAddress(stream.remote_name.to_string(), srv_target.get_port()));
+#if ALPN_SUPPORT
+            tls_connection.set_advertised_protocols(new string[]{"xmpp-client"});
+#endif
             tls_connection.accept_certificate.connect(stream.get_module(Tls.Module.IDENTITY).on_invalid_certificate);
             stream.add_flag(new Tls.Flag() { finished=true });
             return tls_connection;