2 files changed, 2 insertions, 2 deletions
diff --git a/src/plugins/imageviewer/imageviewer.cpp b/src/plugins/imageviewer/imageviewer.cpp
index ea32b433df..817cd5ea60 100644
--- a/src/plugins/imageviewer/imageviewer.cpp
+++ b/src/plugins/imageviewer/imageviewer.cpp
@@ -175,7 +175,7 @@ ImageViewer::~ImageViewer()
     delete d;
 }
 
-Core::IDocument *ImageViewer::document()
+Core::IDocument *ImageViewer::document() const
 {
     return d->file.data();
 }
diff --git a/src/plugins/imageviewer/imageviewer.h b/src/plugins/imageviewer/imageviewer.h
index 1d3418ac4d..8934d35c3f 100644
--- a/src/plugins/imageviewer/imageviewer.h
+++ b/src/plugins/imageviewer/imageviewer.h
@@ -49,7 +49,7 @@ public:
     explicit ImageViewer(QWidget *parent = 0);
     ~ImageViewer() override;
 
-    Core::IDocument *document() override;
+    Core::IDocument *document() const override;
     QWidget *toolBar() override;
 
     IEditor *duplicate() override;