diff --git a/ChangeLog b/ChangeLog
index 925535fdd..cfb3c3ce4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2008-08-23  Tatsuhiro Tsujikawa  <tujikawa at rednoah dot com>
+
+	Fixed error handling of lseek.
+	* src/AbstractDiskWriter.cc
+
 2008-08-17  Tatsuhiro Tsujikawa  <tujikawa at rednoah dot com>
 
 	Removed "(1.x/2.x)" from TEXT_LOAD_COOKIES since aria2 can load Firefox3
diff --git a/src/AbstractDiskWriter.cc b/src/AbstractDiskWriter.cc
index 0fd0e4853..9ef6d696e 100644
--- a/src/AbstractDiskWriter.cc
+++ b/src/AbstractDiskWriter.cc
@@ -124,7 +124,7 @@ ssize_t AbstractDiskWriter::readDataInternal(unsigned char* data, size_t len)
 
 void AbstractDiskWriter::seek(off_t offset)
 {
-  if(offset != lseek(fd, offset, SEEK_SET)) {
+  if(lseek(fd, offset, SEEK_SET) == (off_t)-1) {
     throw DlAbortEx
       (StringFormat(EX_FILE_SEEK, filename.c_str(), strerror(errno)).str());
   }