diff --git a/src/bsontools/bsonmain.cpp b/src/bsontools/bsonmain.cpp
index 3423d76..0adef25 100755
--- a/src/bsontools/bsonmain.cpp
+++ b/src/bsontools/bsonmain.cpp
@@ -87,6 +87,7 @@ namespace bsontools {
         class node {
         public:
             node(string s) : fieldName(s) {}
+            virtual ~node() {}
             string fieldName;
             virtual void emit(bsonobjbuilder& b) = 0;
             virtual void print(int) = 0;
diff --git a/src/bsontools/hex.cpp b/src/bsontools/hex.cpp
index 611b7a4..4d40c2d 100755
--- a/src/bsontools/hex.cpp
+++ b/src/bsontools/hex.cpp
@@ -78,7 +78,7 @@ int main(int argc, char* argv[])
                 cout << '\n';
                 if (!cin.eof() )
                     cout << "\n";
-                txt.empty();
+                txt.clear();
                 continue;
             }
         }