diff --git a/ipaacalib/cpp/test/CMakeLists.txt b/ipaacalib/cpp/test/CMakeLists.txt
index 48a93b3076055ea696023cad76ca03d201e024ab..6a56b612432f325165ffeeb542e002aa06ae4130 100644
--- a/ipaacalib/cpp/test/CMakeLists.txt
+++ b/ipaacalib/cpp/test/CMakeLists.txt
@@ -3,6 +3,9 @@ cmake_minimum_required (VERSION 2.6)
 # project name
 project (ipaaca_cpp_test)
 
+# use C++11 (starting with proto v2 / ipaaca-c++ release 12)
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
+
 ## use the following line to enable console debug messages in ipaaca
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DIPAACA_DEBUG_MESSAGES")