diff --git a/src/gui/image/qimagereader.cpp b/src/gui/image/qimagereader.cpp
index a91805c3f38..e943559ffd5 100644
--- a/src/gui/image/qimagereader.cpp
+++ b/src/gui/image/qimagereader.cpp
@@ -746,12 +746,12 @@ bool QImageReader::decideFormatFromContent() const
 */
 void QImageReader::setDevice(QIODevice *device)
 {
+    delete d->handler;
+    d->handler = nullptr;
     if (d->device && d->deleteDevice)
         delete d->device;
     d->device = device;
     d->deleteDevice = false;
-    delete d->handler;
-    d->handler = nullptr;
     d->text.clear();
 }
 
diff --git a/src/gui/image/qimagewriter.cpp b/src/gui/image/qimagewriter.cpp
index 9a2ba85afde..ae8db3d3b51 100644
--- a/src/gui/image/qimagewriter.cpp
+++ b/src/gui/image/qimagewriter.cpp
@@ -362,13 +362,13 @@ QByteArray QImageWriter::format() const
 */
 void QImageWriter::setDevice(QIODevice *device)
 {
+    delete d->handler;
+    d->handler = nullptr;
     if (d->device && d->deleteDevice)
         delete d->device;
 
     d->device = device;
     d->deleteDevice = false;
-    delete d->handler;
-    d->handler = nullptr;
 }
 
 /*!