diff --git a/include/SAX/helpers/AttributesImpl.hpp b/include/SAX/helpers/AttributesImpl.hpp
index 064c2841..12ae708d 100644
--- a/include/SAX/helpers/AttributesImpl.hpp
+++ b/include/SAX/helpers/AttributesImpl.hpp
@@ -8,6 +8,7 @@
 #include <SAX/Attributes.hpp>
 #include <stdexcept>
 #include <deque>
+#include <sstream>
 
 namespace Arabica
 {
@@ -546,9 +547,9 @@ private:
   void badIndex(unsigned int index)
   {
     // sort out
-    std::string msg =
-	    "Attempt to modify attribute at illegal index: " + index;
-    throw std::out_of_range(msg);
+    std::stringstream msg;
+    msg << "Attempt to modify attribute at illegal index: " << index;
+    throw std::out_of_range(msg.str());
   }
 
   class AttributeNamed
diff --git a/include/Taggle/impl/html/HTMLScanner.hpp b/include/Taggle/impl/html/HTMLScanner.hpp
index 6be7aaf8..1001b2d7 100644
--- a/include/Taggle/impl/html/HTMLScanner.hpp
+++ b/include/Taggle/impl/html/HTMLScanner.hpp
@@ -1,6 +1,7 @@
 #ifndef ARABICA_SAX_TAGGLE_HTML_SCANNER_HPP
 #define ARABICA_SAX_TAGGLE_HTML_SCANNER_HPP
   
+#include <sstream>
 #include <SAX/SAXException.hpp>
 #include <SAX/Locator.hpp>
 #include <XML/XMLCharacterClasses.hpp>
@@ -473,7 +474,9 @@ public:
           outputBuffer_.clear();
           break;
         default:
-          throw std::runtime_error("Can't process state " + action);
+          throw std::runtime_error(
+              "Can't process state " + static_cast<std::stringstream const&>(
+                  std::stringstream() << action).str());
       } // switch ...
       state_ = nextState_;
     } // while (state_ != S_DONE)