diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8d4b67c..0286e98 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -206,8 +206,8 @@ set(PDF2HTMLEX_SRC ${PDF2HTMLEX_SRC}
     src/util/path.cc
     src/util/unicode.h
     src/util/unicode.cc
-    src/util/win32.h
-    src/util/win32.cc
+    src/util/mingw.h
+    src/util/mingw.cc
     src/ArgParser.h
     src/ArgParser.cc
     src/Base64Stream.h
diff --git a/src/TmpFiles.cc b/src/TmpFiles.cc
index 1cc9e22..cecd90d 100644
--- a/src/TmpFiles.cc
+++ b/src/TmpFiles.cc
@@ -14,7 +14,10 @@
 
 #include "TmpFiles.h"
 #include "Param.h"
-#include "util/win32.h"
+
+#ifdef __MINGW32__
+#include "util/mingw.h"
+#endif
 
 using namespace std;
 
diff --git a/src/pdf2htmlEX.cc b/src/pdf2htmlEX.cc
index 68546d8..1f306c2 100644
--- a/src/pdf2htmlEX.cc
+++ b/src/pdf2htmlEX.cc
@@ -35,7 +35,10 @@
 
 #include "util/path.h"
 #include "util/ffw.h"
-#include "util/win32.h"
+
+#ifdef __MINGW32__
+#include "util/mingw.h"
+#endif
 
 using namespace std;
 using namespace pdf2htmlEX;
@@ -343,12 +346,12 @@ void check_param()
 int main(int argc, char **argv)
 {
     // We need to adjust these directories before parsing the options.
-#ifndef __MINGW32__
-    param.tmp_dir = "/tmp";
-    param.data_dir = PDF2HTMLEX_DATA_PATH;
-#else
+#if defined(__MINGW32__)
     param.data_dir = get_exec_dir(argv[0]);
     param.tmp_dir  = get_tmp_dir();
+#else
+    param.tmp_dir = "/tmp";
+    param.data_dir = PDF2HTMLEX_DATA_PATH;
 #endif
 
     parse_options(argc, argv);
diff --git a/src/util/win32.cc b/src/util/mingw.cc
similarity index 84%
rename from src/util/win32.cc
rename to src/util/mingw.cc
index ee45511..5d75be0 100644
--- a/src/util/win32.cc
+++ b/src/util/mingw.cc
@@ -14,7 +14,7 @@
 #include <limits.h>
 #include <libgen.h>
 
-#include "win32.h"
+#include "mingw.h"
 
 using namespace std;
 
@@ -55,12 +55,7 @@ string get_tmp_dir()
         tmp = getenv("TEMP");
     }
 
-    if (tmp == nullptr) {
-        cerr << "Error: Cannot find temporary directory. Export TMP/TEMP variable.";
-        exit(EXIT_FAILURE);
-    }
-
-    return std::string(tmp) + "/";
+    return tmp != nullptr ? string(tmp) + "/" : "/";
 }
 
 } // namespace pdf2htmlEX;
diff --git a/src/util/win32.h b/src/util/mingw.h
similarity index 86%
rename from src/util/win32.h
rename to src/util/mingw.h
index a2e6dd0..f7a3b52 100644
--- a/src/util/win32.h
+++ b/src/util/mingw.h
@@ -5,8 +5,8 @@
  * 2014.01.13
  */
 
-#ifndef WIN32_H__
-#define WIN32_H__
+#ifndef MINGW_H__
+#define MINGW_H__
 
 #ifdef __MINGW32__
 
@@ -24,5 +24,5 @@ namespace pdf2htmlEX {
 
 #endif //__MINGW32__
 
-#endif //WIN32_H__
+#endif //MINGW_H__
 
diff --git a/src/util/path.cc b/src/util/path.cc
index 15e5200..4d451f6 100644
--- a/src/util/path.cc
+++ b/src/util/path.cc
@@ -11,7 +11,10 @@
 #include <cstring>
 
 #include "path.h"
-#include "win32.h"
+
+#ifdef __MINGW32__
+#include "util/mingw.h"
+#endif
 
 using std::string;