diff --git a/src/ast.cpp b/src/ast.cpp
index 273bbd850d..dbe534559f 100644
--- a/src/ast.cpp
+++ b/src/ast.cpp
@@ -291,7 +291,7 @@ namespace Sass {
     {
       for (i = 0, L = rhs->length(); i < L; ++i)
       {
-        if ((typeid(*(*rhs)[i]) == typeid(Pseudo_Selector) || typeid(*(*rhs)[i]) == typeid(Wrapped_Selector)) && (*rhs)[L-1]->is_pseudo_element())
+        if ((dynamic_cast<Pseudo_Selector*>((*rhs)[i]) || dynamic_cast<Wrapped_Selector*>((*rhs)[i])) && (*rhs)[L-1]->is_pseudo_element())
         { found = true; break; }
       }
     }
@@ -299,7 +299,7 @@ namespace Sass {
     {
       for (i = 0, L = rhs->length(); i < L; ++i)
       {
-        if (typeid(*(*rhs)[i]) == typeid(Pseudo_Selector) || typeid(*(*rhs)[i]) == typeid(Wrapped_Selector))
+        if (dynamic_cast<Pseudo_Selector*>((*rhs)[i]) || dynamic_cast<Wrapped_Selector*>((*rhs)[i]))
         { found = true; break; }
       }
     }
diff --git a/src/ast.hpp b/src/ast.hpp
index 655e759da0..e6af937537 100644
--- a/src/ast.hpp
+++ b/src/ast.hpp
@@ -189,8 +189,8 @@ namespace Sass {
     virtual ~Vectorized() = 0;
     size_t length() const   { return elements_.size(); }
     bool empty() const      { return elements_.empty(); }
-    T last()                { return elements_.back(); }
-    T first()               { return elements_.front(); }
+    T last() const          { return elements_.back(); }
+    T first() const         { return elements_.front(); }
     T& operator[](size_t i) { return elements_[i]; }
     virtual const T& at(size_t i) const { return elements_.at(i); }
     const T& operator[](size_t i) const { return elements_[i]; }
@@ -2079,9 +2079,9 @@ namespace Sass {
     }
     const Simple_Selector* base() const {
       if (length() == 0) return 0;
-      if (typeid(*(*this)[0]) == typeid(Type_Selector))
+      // ToDo: why is this needed?
+      if (dynamic_cast<Type_Selector*>((*this)[0]))
         return (*this)[0];
-//      else cerr << "SERIOUSELY " << "\n";
       return 0;
     }
     virtual bool is_superselector_of(Compound_Selector* sub, std::string wrapped = "");
@@ -2098,7 +2098,7 @@ namespace Sass {
     bool is_empty_reference()
     {
       return length() == 1 &&
-             typeid(*(*this)[0]) == typeid(Parent_Selector);
+             dynamic_cast<Parent_Selector*>((*this)[0]);
     }
     std::vector<std::string> to_str_vec(); // sometimes need to convert to a flat "by-value" data structure
 
diff --git a/src/eval.cpp b/src/eval.cpp
index be48071911..80920ac4da 100644
--- a/src/eval.cpp
+++ b/src/eval.cpp
@@ -638,7 +638,7 @@ namespace Sass {
       To_String to_string(&ctx);
       // Special cases: +/- variables which evaluate to null ouput just +/-,
       // but +/- null itself outputs the string
-      if (operand->concrete_type() == Expression::NULL_VAL && typeid(*(u->operand())) == typeid(Variable)) {
+      if (operand->concrete_type() == Expression::NULL_VAL && dynamic_cast<Variable*>(u->operand())) {
         u->operand(SASS_MEMORY_NEW(ctx.mem, String_Quoted, u->pstate(), ""));
       }
       else u->operand(operand);