diff -Nru a/cegui/src/XMLParserModules/RapidXML/XMLParser.cpp b/cegui/src/XMLParserModules/RapidXML/XMLParser.cpp
--- a/cegui/src/XMLParserModules/RapidXML/XMLParser.cpp	2018-03-22 18:41:47.000000000 +0100
+++ b/cegui/src/XMLParserModules/RapidXML/XMLParser.cpp	2018-09-02 10:51:34.710451347 +0200
@@ -144,7 +144,7 @@
             break;
 
         case rapidxml::node_data:
-            if (childNode->value() != '\0')
+            if (childNode->value() != nullptr)
                 d_handler->text(
                     reinterpret_cast<encoded_char*>(childNode->value()));
 
diff -Nru a/cegui/src/XMLParserModules/TinyXML/XMLParser.cpp b/cegui/src/XMLParserModules/TinyXML/XMLParser.cpp
--- a/cegui/src/XMLParserModules/TinyXML/XMLParser.cpp	2018-03-22 18:41:47.000000000 +0100
+++ b/cegui/src/XMLParserModules/TinyXML/XMLParser.cpp	2018-09-02 10:50:41.577454932 +0200
@@ -130,7 +130,7 @@
                 processElement(childNode->ToElement());
                 break;
             case TiXmlNode::CEGUI_TINYXML_TEXT:
-                if (childNode->ToText()->Value() != 0)
+                if (childNode->ToText()->Value() != nullptr)
                     d_handler->text(reinterpret_cast<const encoded_char*>(childNode->ToText()->Value()));
                 break;
 
diff -Nru a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt	2018-03-22 18:41:47.000000000 +0100
+++ b/CMakeLists.txt	2018-09-02 10:49:42.689458906 +0200
@@ -73,7 +73,7 @@
 
 if (CMAKE_COMPILER_IS_GNUCXX OR (CMAKE_CXX_COMPILER_ID STREQUAL "Clang"))
     set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=c99")
-    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++03")
+    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
 elseif (NOT CMAKE_VERSION VERSION_LESS "3.1")
     set (CMAKE_C_STANDARD_REQUIRED TRUE)
     set (CMAKE_C_STANDARD "99")