diff --git a/src/diskfile.cpp b/src/diskfile.cpp
index 50ece580..4832aa7a 100644
--- a/src/diskfile.cpp
+++ b/src/diskfile.cpp
@@ -43,7 +43,7 @@ static char THIS_FILE[]=__FILE__;
 
 DiskFile::DiskFile(void)
 {
-  filename;
+  filename = "";
   filesize = 0;
   offset = 0;
 
@@ -112,8 +112,9 @@ bool DiskFile::Create(string _filename, u64 _filesize)
   if (filesize > 0)
   {
     // Seek to the end of the file
-    LONG lowoffset = ((LONG*)&filesize)[0];
-    LONG highoffset = ((LONG*)&filesize)[1];
+    LONG* ptrfilesize = (LONG*)&filesize;
+    LONG lowoffset = ptrfilesize[0];
+    LONG highoffset = ptrfilesize[1];
 
     if (INVALID_SET_FILE_POINTER == SetFilePointer(hFile, lowoffset, &highoffset, FILE_BEGIN))
     {
@@ -157,8 +158,9 @@ bool DiskFile::Write(u64 _offset, const void *buffer, size_t length)
 
   if (offset != _offset)
   {
-    LONG lowoffset = ((LONG*)&_offset)[0];
-    LONG highoffset = ((LONG*)&_offset)[1];
+    LONG* ptrfilesize = (LONG*)&filesize;
+    LONG lowoffset = ptrfilesize[0];
+    LONG highoffset = ptrfilesize[1];
 
     // Seek to the required offset
     if (INVALID_SET_FILE_POINTER == SetFilePointer(hFile, lowoffset, &highoffset, FILE_BEGIN))
@@ -242,8 +244,9 @@ bool DiskFile::Read(u64 _offset, void *buffer, size_t length)
 
   if (offset != _offset)
   {
-    LONG lowoffset = ((LONG*)&_offset)[0];
-    LONG highoffset = ((LONG*)&_offset)[1];
+    LONG* ptrfilesize = (LONG*)&filesize;
+    LONG lowoffset = ptrfilesize[0];
+    LONG highoffset = ptrfilesize[1];
 
     // Seek to the required offset
     if (INVALID_SET_FILE_POINTER == SetFilePointer(hFile, lowoffset, &highoffset, FILE_BEGIN))
@@ -297,7 +300,7 @@ string DiskFile::GetCanonicalPathname(string filename)
   char *filepart;
 
   // Resolve a relative path to a full path
-  int length = ::GetFullPathName(filename.c_str(), sizeof(fullname), fullname, &filepart);
+  unsigned int length = ::GetFullPathName(filename.c_str(), sizeof(fullname), fullname, &filepart);
   if (length <= 0 || sizeof(fullname) < length)
     return filename;
 
@@ -1073,7 +1076,7 @@ string DiskFile::ErrorMessage(DWORD error)
   else
   {
     char message[40];
-    snprintf(message, sizeof(message), "Unknown error code (%d)", error);
+    snprintf(message, sizeof(message), "Unknown error code (%lu)", error);
     result = message;
   }
 
diff --git a/src/par2cmdline.h b/src/par2cmdline.h
index 12c96ecd..119e490f 100644
--- a/src/par2cmdline.h
+++ b/src/par2cmdline.h
@@ -52,8 +52,8 @@ typedef unsigned char    u8;
 typedef signed char      i8;
 typedef unsigned short   u16;
 typedef signed short     i16;
-typedef unsigned long    u32;
-typedef signed long      i32;
+typedef unsigned int     u32;
+typedef signed int       i32;
 typedef unsigned __int64 u64;
 typedef signed __int64   i64;