diff --git a/hwpfilter/qa/cppunit/data/fail/skipblock-1.hwp b/hwpfilter/qa/cppunit/data/fail/skipblock-1.hwp
new file mode 100644
index 000000000000..8fd8e7abf9fc
Binary files /dev/null and b/hwpfilter/qa/cppunit/data/fail/skipblock-1.hwp differ
diff --git a/hwpfilter/source/hiodev.cxx b/hwpfilter/source/hiodev.cxx
index 98001e99a6a8..48d105ff23ed 100644
--- a/hwpfilter/source/hiodev.cxx
+++ b/hwpfilter/source/hiodev.cxx
@@ -242,8 +242,12 @@ int HStreamIODev::skipBlock(int size)
           else{
                 int remain = size;
                 while(remain){
-                     if( remain > BUFSIZE )
-                          remain -= GZREAD(rBuf, BUFSIZE);
+                     if( remain > BUFSIZE ) {
+                          int read = GZREAD(rBuf, BUFSIZE);
+                          remain -= read;
+                          if (read != BUFSIZE)
+                              break;
+                     }
                      else{
                           remain -= GZREAD(rBuf, remain);
                           break;