diff --git a/mecab/src/common.h b/mecab/src/common.h
index d1fc459..2951d5a 100644
--- a/mecab/src/common.h
+++ b/mecab/src/common.h
@@ -86,7 +86,8 @@
 #define WPATH_FORCE(path) (MeCab::Utf8ToWide(path).c_str())
 #define WPATH(path) (path)
 #else
-#define WPATH(path) WPATH_FORCE(path)
+#define WPATH_FORCE(path) (MeCab::Utf8ToWide(path).c_str())
+#define WPATH(path) (path)
 #endif
 #else
 #define WPATH_FORCE(path) (path)
diff --git a/mecab/src/feature_index.cpp b/mecab/src/feature_index.cpp
index 051bdf8..fdd0145 100644
--- a/mecab/src/feature_index.cpp
+++ b/mecab/src/feature_index.cpp
@@ -353,7 +353,7 @@ bool FeatureIndex::buildUnigramFeature(LearnerPath *path,
               if (!r) goto NEXT;
               os_ << r;
             } break;
-            case 't':  os_ << (size_t)path->rnode->char_type;     break;
+            case 't':  os_ << (int)(size_t)path->rnode->char_type;     break;
             case 'u':  os_ << ufeature; break;
             case 'w':
               if (path->rnode->stat == MECAB_NOR_NODE) {
diff --git a/mecab/src/writer.cpp b/mecab/src/writer.cpp
index 0ef6975..f068fa3 100644
--- a/mecab/src/writer.cpp
+++ b/mecab/src/writer.cpp
@@ -257,7 +257,7 @@ bool Writer::writeNode(Lattice *lattice,
             // input sentence
           case 'S': os->write(lattice->sentence(), lattice->size()); break;
             // sentence length
-          case 'L': *os << lattice->size(); break;
+          case 'L': *os << (int)lattice->size(); break;
             // morph
           case 'm': os->write(node->surface, node->length); break;
           case 'M': os->write(reinterpret_cast<const char *>