diff --git a/src/md5.h b/src/md5.h
index c42868ff6..3f66e2976 100644
--- a/src/md5.h
+++ b/src/md5.h
@@ -8,15 +8,15 @@ class MD5
 
 public:
     // methods for controlled operation:
-    MD5(); // simple initializer
+    MD5(); // default constructor
     void update(unsigned char* input, unsigned int input_length);
     void finalize();
 
 public:
     // first, some types:
-    typedef unsigned int uint4;       // assumes integer is 4 words long
-    typedef unsigned short int uint2; // assumes short integer is 2 words long
-    typedef unsigned char uint1;      // assumes char is 1 word long
+    typedef unsigned int uint4;       // assumes integer is 4 bytes long
+    typedef unsigned short int uint2; // assumes short integer is 2 bytes long
+    typedef unsigned char uint1;      // assumes char is 1 byte long
 
     // next, the private data:
     uint4 state[4];