diff --git a/.travis.yml b/.travis.yml
index 330a5bf9ac9..9f1d9a0f1cb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -39,11 +39,11 @@ matrix:
       env: CMAKE_OPTIONS="-DRModular=ON" EXTRA_PACKAGES="r-base-core swig2.0" CC=clang CXX=clang++
   allow_failures:
     - compiler: clang
-      env: CMAKE_OPTIONS="-DRModular=ON" EXTRA_PACKAGES="r-base-core swig2.0"
+      env: CMAKE_OPTIONS="-DRModular=ON" EXTRA_PACKAGES="r-base-core swig2.0" CC=clang CXX=clang++
     - compiler: clang
       python: 3.3
       language: python
-      env: CMAKE_OPTIONS="-DPythonModular=ON" EXTRA_PACKAGES="python3-scipy swig2.0"
+      env: CMAKE_OPTIONS="-DPythonModular=ON" EXTRA_PACKAGES="python3-scipy swig2.0" CC=clang CXX=clang++
 virtualenv:
   system_site_packages: true
 before_install:
diff --git a/CMakeLists.txt b/CMakeLists.txt
index e4b9f19ee59..8a1854b6aa5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -66,12 +66,18 @@ ENDIF()
 # check for supported c++11 features
 INCLUDE(CheckCXX11Features)
 
-IF(CXX11_COMPILER_FLAGS)
+IF(_HAS_CXX11_FLAG)
 	LIST(APPEND DEFINES HAVE_CXX11)
 	SET(HAVE_CXX11 1)
 	SET(CMAKE_CXX_FLAGS "${CXX11_COMPILER_FLAGS} ${CMAKE_CXX_FLAGS}")
 ENDIF()
 
+IF(_HAS_CXX0X_FLAG)
+	LIST(APPEND DEFINES HAVE_CXX0X)
+	SET(HAVE_CXX0X 1)
+	SET(CMAKE_CXX_FLAGS "${CXX11_COMPILER_FLAGS} ${CMAKE_CXX_FLAGS}")
+ENDIF()
+
 IF (HAVE_CXX11_ATOMIC)
 	LIST(APPEND DEFINES HAVE_CXX11_ATOMIC)
 ENDIF()
diff --git a/src/shogun/lib/SGReferencedData.cpp b/src/shogun/lib/SGReferencedData.cpp
index 1c1f3c29cbb..5a3a8b817a6 100644
--- a/src/shogun/lib/SGReferencedData.cpp
+++ b/src/shogun/lib/SGReferencedData.cpp
@@ -3,7 +3,7 @@
 #include <shogun/io/SGIO.h>
 #include <shogun/lib/Lock.h>
 
-#ifdef HAVE_CXX11
+#ifdef HAVE_CXX11_ATOMIC
 #include <atomic>
 #endif
 
@@ -16,7 +16,7 @@ class RefCount
 public:
 	RefCount() : rc(0) {};
 	/** reference count */
-#ifdef HAVE_CXX11
+#ifdef HAVE_CXX11_ATOMIC
     volatile std::atomic<int> rc;
 #else
 	int32_t rc;
@@ -62,7 +62,7 @@ int32_t SGReferencedData::ref_count()
 	if (m_refcount == NULL)
 		return -1;
 
-#ifdef HAVE_CXX11
+#ifdef HAVE_CXX11_ATOMIC
 	int32_t c = m_refcount->rc.load();
 #else
 	m_refcount->lock.lock();
@@ -93,7 +93,7 @@ int32_t SGReferencedData::ref()
 		return -1;
 	}
 
-#ifdef HAVE_CXX11
+#ifdef HAVE_CXX11_ATOMIC
 	int32_t c = m_refcount->rc.fetch_add(1)+1;
 #else
 	m_refcount->lock.lock();
@@ -120,7 +120,7 @@ int32_t SGReferencedData::unref()
 		return -1;
 	}
 
-#ifdef HAVE_CXX11
+#ifdef HAVE_CXX11_ATOMIC
 	int32_t c = m_refcount->rc.fetch_sub(1)-1;
 #else
 	m_refcount->lock.lock();
diff --git a/src/shogun/lib/config.h.in b/src/shogun/lib/config.h.in
index f1d7ed1b848..ca5bbb1cf5f 100644
--- a/src/shogun/lib/config.h.in
+++ b/src/shogun/lib/config.h.in
@@ -63,6 +63,7 @@
 
 #cmakedefine NARRAY_LIB "@NARRAY_LIB@"
 
+#cmakedefine HAVE_CXX0X 1
 #cmakedefine HAVE_CXX11 1
 #cmakedefine HAVE_CXX11_ATOMIC 1