diff --git a/CMakeLists.txt b/CMakeLists.txt
index 83a2632..885868d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,7 +3,7 @@ PROJECT(CPPJIEBA)
 CMAKE_MINIMUM_REQUIRED (VERSION 2.8)
 
 SET(CMAKE_INSTALL_PREFIX  /usr)
-ADD_DEFINITIONS(-std=c++0x -O3)
+ADD_DEFINITIONS(-std=c++0x -O3 -Wall)
 IF (DEFINED ENC)
     ADD_DEFINITIONS(-DCPPJIEBA_${ENC})
 ENDIF()
diff --git a/src/FullSegment.hpp b/src/FullSegment.hpp
index b722b07..5c997e4 100644
--- a/src/FullSegment.hpp
+++ b/src/FullSegment.hpp
@@ -71,7 +71,7 @@ namespace CppJieba
                         for (vector<pair<uint, const TrieNodeInfo*> >::const_iterator itr = tRes.begin(); itr != tRes.end(); itr++)
                         {
                             wordLen = itr->second->word.size();
-                            if (wordLen >= 2 || tRes.size() == 1 && maxIdx <= uIdx)
+                            if (wordLen >= 2 || (tRes.size() == 1 && maxIdx <= uIdx))
                             {
                                 res.push_back(itr->second->word);
                             }
diff --git a/src/Limonp/md5.hpp b/src/Limonp/md5.hpp
index 8b861e1..9aa20cf 100644
--- a/src/Limonp/md5.hpp
+++ b/src/Limonp/md5.hpp
@@ -34,7 +34,7 @@
 namespace Limonp 
 {
 
-#pragma region MD5 defines
+//#pragma region MD5 defines
 // Constants for MD5Transform routine.
 #define S11 7
 #define S12 12
@@ -85,7 +85,7 @@ namespace Limonp
   (a) = ROTATE_LEFT ((a), (s)); \
   (a) += (b); \
   }
-#pragma endregion
+//#pragma endregion
 
 
 typedef unsigned char BYTE ;
@@ -115,7 +115,7 @@ private:
     unsigned char buffer[64];                         /* input buffer */
   } context ;
 
-  #pragma region static helper functions
+  //#pragma region static helper functions
   // The core of the MD5 algorithm is here.
   // MD5 basic transformation. Transforms state based on block.
   static void MD5Transform( UINT4 state[4], unsigned char block[64] )
@@ -229,7 +229,7 @@ private:
       output[i] = ((UINT4)input[j]) | (((UINT4)input[j+1]) << 8) |
       (((UINT4)input[j+2]) << 16) | (((UINT4)input[j+3]) << 24);
   }
-  #pragma endregion
+  //#pragma endregion
 
 
 public:
@@ -354,7 +354,7 @@ public:
     }
     else
     {
-      while( len = fread( buffer, 1, 1024, file ) )
+      while( (len = fread( buffer, 1, 1024, file )) )
         Update( buffer, len ) ;
       Final();