diff --git a/eo/src/eoVariableLengthCrossover.h b/eo/src/eoVariableLengthCrossover.h
index f6e72f9d..1e0772da 100644
--- a/eo/src/eoVariableLengthCrossover.h
+++ b/eo/src/eoVariableLengthCrossover.h
@@ -157,7 +157,7 @@ public :
   {
       std::ostringstream os;
       os << "eoVlAtomExchangeQuadOp(" << atomExchange.className() << ")";
-      return os.str()
+      return os.str();
   }
 
 private: