diff --git a/src/ctx.cpp b/src/ctx.cpp
index b4aab466..b6011fb8 100644
--- a/src/ctx.cpp
+++ b/src/ctx.cpp
@@ -20,7 +20,7 @@
 */
 
 #include "platform.hpp"
-#if defined ZMQ_HAVE_WINDOWS
+#ifdef ZMQ_HAVE_WINDOWS
 #include "windows.hpp"
 #else
 #include <unistd.h>
@@ -245,10 +245,10 @@ void zmq::ctx_t::destroy_socket (class socket_base_t *socket_)
 {
     slot_sync.lock ();
 
-    //  Free the associared thread slot.
+    //  Free the associated thread slot.
     uint32_t tid = socket_->get_tid ();
     empty_slots.push_back (tid);
-    slots [tid] = NULL;    
+    slots [tid] = NULL;
 
     //  Remove the socket from the list of sockets.
     sockets.erase (socket_);
@@ -322,7 +322,7 @@ void zmq::ctx_t::unregister_endpoints (socket_base_t *socket_)
         }
         ++it;
     }
-        
+
     endpoints_sync.unlock ();
 }
 
diff --git a/src/ctx.hpp b/src/ctx.hpp
index f9d02a2f..6c13518a 100644
--- a/src/ctx.hpp
+++ b/src/ctx.hpp
@@ -48,18 +48,18 @@ namespace zmq
     //  for synchronisation, handshaking or similar.
     struct endpoint_t
     {
-        class socket_base_t *socket;
+        socket_base_t *socket;
         options_t options;
     };
 
     //  Context object encapsulates all the global state associated with
     //  the library.
-    
+
     class ctx_t
     {
     public:
 
-        //  Create the context object
+        //  Create the context object.
         ctx_t ();
 
         //  Returns false if object is not a context.
@@ -71,10 +71,10 @@ namespace zmq
         //  after the last one is closed.
         int terminate ();
 
-        //  Set and set context properties
+        //  Set and get context properties.
         int set (int option_, int optval_);
         int get (int option_);
-        
+
         //  Create and destroy a socket.
         zmq::socket_base_t *create_socket (int type_);
         void destroy_socket (zmq::socket_base_t *socket_);
@@ -84,7 +84,7 @@ namespace zmq
 
         //  Returns the I/O thread that is the least busy at the moment.
         //  Affinity specifies which I/O threads are eligible (0 = all).
-        //  Returns NULL is no I/O thread is available.
+        //  Returns NULL if no I/O thread is available.
         zmq::io_thread_t *choose_io_thread (uint64_t affinity_);
 
         //  Returns reaper thread object.
@@ -117,8 +117,8 @@ namespace zmq
         typedef std::vector <uint32_t> emtpy_slots_t;
         emtpy_slots_t empty_slots;
 
-        //  If true, zmq_init has been called but no socket have been created
-        //  yes. Launching of I/O threads is delayed.
+        //  If true, zmq_init has been called but no socket has been created
+        //  yet. Launching of I/O threads is delayed.
         bool starting;
 
         //  If true, zmq_term was already called.
@@ -162,11 +162,11 @@ namespace zmq
 
         //  Synchronisation of access to context options.
         mutex_t opt_sync;
-        
+
         ctx_t (const ctx_t&);
         const ctx_t &operator = (const ctx_t&);
     };
-    
+
 }
 
 #endif