diff --git a/openbr/gui/imageviewer.cpp b/openbr/gui/imageviewer.cpp
index a0dbe54..5512c78 100644
--- a/openbr/gui/imageviewer.cpp
+++ b/openbr/gui/imageviewer.cpp
@@ -36,7 +36,8 @@ void br::ImageViewer::setDefaultText(const QString &text)
 
 void br::ImageViewer::setImage(const QString &file, bool async)
 {
-    src = QImage(file);
+    if(file.isNull()) src = QImage(); // Gets rid of runtime FileEngine::open warning
+    else src = QImage(file);
     updatePixmap(async);
 }
 
diff --git a/openbr/plugins/quality.cpp b/openbr/plugins/quality.cpp
index 90150bf..b204229 100644
--- a/openbr/plugins/quality.cpp
+++ b/openbr/plugins/quality.cpp
@@ -269,6 +269,8 @@ class HeatMapDistance : public Distance
         (void) target;
         (void) query;
         qFatal("You did this wrong");
+
+        return 0;
     }
 
     // Switch this to template list version, use compare(template, template) in