diff --git a/src/attachmenticonview.h b/src/attachmenticonview.h
--- a/src/attachmenticonview.h
+++ b/src/attachmenticonview.h
@@ -46,15 +46,11 @@
     explicit AttachmentIconView(QWidget *parent = nullptr);
 
     Q_REQUIRED_RESULT QMimeData *mimeData() const;
-    Q_REQUIRED_RESULT QUrl tempFileForAttachment(const KCalCore::Attachment::Ptr &attachment) const;
 
 protected:
     QMimeData *mimeData(const QList<QListWidgetItem *> items) const override;
     void startDrag(Qt::DropActions supportedActions) override;
     void keyPressEvent(QKeyEvent *event) override;
-
-private:
-    mutable QHash<KCalCore::Attachment::Ptr, QUrl> mTempFiles;
 };
 
 class AttachmentIconItem : public QListWidgetItem
@@ -85,9 +81,12 @@
 
     void readAttachment();
 
+    Q_REQUIRED_RESULT QUrl tempFileForAttachment();
+
 private:
     KCalCore::Attachment::Ptr mAttachment;
     QString mSaveUri;
+    QUrl mTempFile;
 };
 }
 
diff --git a/src/attachmenticonview.cpp b/src/attachmenticonview.cpp
--- a/src/attachmenticonview.cpp
+++ b/src/attachmenticonview.cpp
@@ -184,34 +184,33 @@
     setContextMenuPolicy(Qt::CustomContextMenu);
 }
 
-QUrl AttachmentIconView::tempFileForAttachment(const KCalCore::Attachment::Ptr &attachment) const
+QUrl AttachmentIconItem::tempFileForAttachment()
 {
-    const QUrl url = mTempFiles.value(attachment);
-    if (url.isValid()) {
-        return url;
+    if (mTempFile.isValid()) {
+        return mTempFile;
     }
     QTemporaryFile *file = nullptr;
 
     QMimeDatabase db;
-    QStringList patterns = db.mimeTypeForName(attachment->mimeType()).globPatterns();
+    QStringList patterns = db.mimeTypeForName(mAttachment->mimeType()).globPatterns();
 
     if (!patterns.empty()) {
         file = new QTemporaryFile(QDir::tempPath() + QLatin1String(
                                       "/attachementview_XXXXX")
                                   + patterns.first().remove(QLatin1Char('*')));
     } else {
         file = new QTemporaryFile();
     }
-    file->setParent(const_cast<AttachmentIconView *>(this));
+    file->setParent(listWidget());
 
     file->setAutoRemove(true);
     file->open();
     // read-only not to give the idea that it could be written to
     file->setPermissions(QFile::ReadUser);
-    file->write(QByteArray::fromBase64(attachment->data()));
-    mTempFiles.insert(attachment, QUrl::fromLocalFile(file->fileName()));
+    file->write(QByteArray::fromBase64(mAttachment->data()));
+    mTempFile = QUrl::fromLocalFile(file->fileName());
     file->close();
-    return mTempFiles.value(attachment);
+    return mTempFile;
 }
 
 QMimeData *AttachmentIconView::mimeData(const QList< QListWidgetItem *> items) const
@@ -223,7 +222,7 @@
         if (it->isSelected()) {
             AttachmentIconItem *item = static_cast<AttachmentIconItem *>(it);
             if (item->isBinary()) {
-                urls.append(tempFileForAttachment(item->attachment()));
+                urls.append(item->tempFileForAttachment());
             } else {
                 urls.append(QUrl(item->uri()));
             }
diff --git a/src/incidenceattachment.cpp b/src/incidenceattachment.cpp
--- a/src/incidenceattachment.cpp
+++ b/src/incidenceattachment.cpp
@@ -254,7 +254,7 @@
     if (att->isUri()) {
         sourceUrl = QUrl(att->uri());
     } else {
-        sourceUrl = mAttachmentView->tempFileForAttachment(att);
+        sourceUrl = attitem->tempFileForAttachment();
     }
     // save the attachment url
     auto job = KIO::file_copy(sourceUrl, QUrl::fromLocalFile(saveAsFile));
@@ -289,7 +289,7 @@
         KRun::RunFlags flags;
         flags |= KRun::DeleteTemporaryFiles;
         flags |= KRun::RunExecutables;
-        KRun::runUrl(mAttachmentView->tempFileForAttachment(att), att->mimeType(), nullptr, flags);
+        KRun::runUrl(attitem->tempFileForAttachment(), att->mimeType(), nullptr, flags);
     }
 }