diff --git a/ChangeLog b/ChangeLog
index e5bf9bf44..7cc9b9b2d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Apr 30 14:15:53 CEST 2008 (tk)
+----------------------------------
+  * libclamav/mspack.c: downgrade some error messages (bb#911)
+
 Wed Apr 30 12:35:29 CEST 2008 (tk)
 ----------------------------------
   * clamav-milter: retrieve db version from daily.cld (bb#942)
diff --git a/libclamav/mspack.c b/libclamav/mspack.c
index 6710e5ec1..795508318 100644
--- a/libclamav/mspack.c
+++ b/libclamav/mspack.c
@@ -125,7 +125,7 @@ static const unsigned short mszip_bit_mask_tab[17] = {
 
 static int mszip_read_input(struct mszip_stream *zip) {
   int nread = zip->read_cb ? zip->read_cb(zip->file, zip->inbuf, (int)zip->inbuf_size) : cli_readn(zip->fd, zip->inbuf, (int)zip->inbuf_size);
-  if (nread < 0) return zip->error = CL_EIO;
+  if (nread < 0) return zip->error = CL_EFORMAT;
 
   zip->i_ptr = &zip->inbuf[0];
   zip->i_end = &zip->inbuf[nread];
@@ -749,7 +749,7 @@ void mszip_free(struct mszip_stream *zip) {
 
 static int lzx_read_input(struct lzx_stream *lzx) {
   int bread = lzx->read_cb ? lzx->read_cb(lzx->file, &lzx->inbuf[0], (int)lzx->inbuf_size) : cli_readn(lzx->fd, &lzx->inbuf[0], (int)lzx->inbuf_size);
-  if (bread < 0) return lzx->error = CL_EIO;
+  if (bread < 0) return lzx->error = CL_EFORMAT;
 
   /* huff decode's ENSURE_BYTES(16) might overrun the input stream, even
    * if those bits aren't used, so fake 2 more bytes */
@@ -1577,7 +1577,7 @@ void lzx_free(struct lzx_stream *lzx) {
 
 static int qtm_read_input(struct qtm_stream *qtm) {
   int nread = qtm->read_cb ? qtm->read_cb(qtm->file, &qtm->inbuf[0], (int)qtm->inbuf_size) : cli_readn(qtm->fd, &qtm->inbuf[0], (int)qtm->inbuf_size);
-  if (nread < 0) return qtm->error = CL_EIO;
+  if (nread < 0) return qtm->error = CL_EFORMAT;
 
   qtm->i_ptr = &qtm->inbuf[0];
   qtm->i_end = &qtm->inbuf[nread];