1 files changed, 6 insertions, 0 deletions
diff --git a/src/gui/image/qtiffhandler.cpp b/src/gui/image/qtiffhandler.cpp
index 4dc9775..51a500d 100644
--- a/src/gui/image/qtiffhandler.cpp
+++ b/src/gui/image/qtiffhandler.cpp
@@ -158,7 +158,13 @@ bool QTiffHandler::canRead(QIODevice *device)
 
     // current implementation uses TIFFClientOpen which needs to be
     // able to seek, so sequential devices are not supported
+    int pos = device->pos();
+    if (pos != 0)
+        device->seek(0);  // need the magic from the beginning
     QByteArray header = device->peek(4);
+    if (pos != 0)
+        device->seek(pos);  // put it back where we found it
+
     return header == QByteArray::fromRawData("\x49\x49\x2A\x00", 4)
            || header == QByteArray::fromRawData("\x4D\x4D\x00\x2A", 4);
 }