diff --git a/src/Sink/ImgArchiveSink.cpp b/src/Sink/ImgArchiveSink.cpp
index 0feb7b6..4e38672 100644
--- a/src/Sink/ImgArchiveSink.cpp
+++ b/src/Sink/ImgArchiveSink.cpp
@@ -263,6 +263,7 @@ QString ImgArchiveSink::makeTempDir(const QString &parent)
             return parent + QDir::separator() + tmpd;
         }
     }
+    qFatal("Failed to create temporary directory");
     return QString::null;
 }