diff --git a/imageringlist.cpp b/imageringlist.cpp
index 41cf312..39e2baa 100644
--- a/imageringlist.cpp
+++ b/imageringlist.cpp
@@ -119,22 +119,28 @@ void ImageRingList::setFiles(const QStringList files)
 
 void ImageRingList::increment()
 {
-    (*m_firstImage)->release();
-    m_firstImage = increment(m_firstImage);
-    m_currImage = increment(m_currImage);
-    (*m_currImage)->load();
-    m_lastImage = increment(m_lastImage);
-    (*m_lastImage)->load();
+    if(m_images.size())
+    {
+        (*m_firstImage)->release();
+        m_firstImage = increment(m_firstImage);
+        m_currImage = increment(m_currImage);
+        (*m_currImage)->load();
+        m_lastImage = increment(m_lastImage);
+        (*m_lastImage)->load();
+    }
 }
 
 void ImageRingList::decrement()
 {
-    (*m_lastImage)->release();
-    m_firstImage = decrement(m_firstImage);
-    m_currImage = decrement(m_currImage);
-    (*m_currImage)->load();
-    m_lastImage = decrement(m_lastImage);
-    (*m_firstImage)->load();
+    if(m_images.size())
+    {
+        (*m_lastImage)->release();
+        m_firstImage = decrement(m_firstImage);
+        m_currImage = decrement(m_currImage);
+        (*m_currImage)->load();
+        m_lastImage = decrement(m_lastImage);
+        (*m_firstImage)->load();
+    }
 }
 
 QList<shared_ptr<Image>>::iterator ImageRingList::increment(QList<ImagePtr>::iterator iter)