diff --git a/loadimage.cpp b/loadimage.cpp
index 8beabc2..d489753 100644
--- a/loadimage.cpp
+++ b/loadimage.cpp
@@ -248,7 +248,7 @@ bool loadXISF(const QString &path, ImageInfoData &info, std::shared_ptr<RawImage
         }
 
         info.num = xisf.imagesCount();
-        info.index = index + 1;
+        info.index = index;
         info.wcs = std::make_shared<WCSDataT>(xisfImage.width(), xisfImage.height(), info.fitsHeader);
         info.info.append({QObject::tr("Width"), QString::number(xisfImage.width())});
         info.info.append({QObject::tr("Height"), QString::number(xisfImage.height())});