diff --git a/libs/image/kis_pixel_selection.cpp b/libs/image/kis_pixel_selection.cpp
index 9686980..a6980f5 100644
--- a/libs/image/kis_pixel_selection.cpp
+++ b/libs/image/kis_pixel_selection.cpp
@@ -151,7 +151,7 @@ void KisPixelSelection::applySelection(KisPixelSelectionSP selection, SelectionA
         intersectSelection(selection);
         break;
     case SELECTION_SYMMETRICDIFFERENCE:
-        symmetricdifferenceSelection(selection);
+        symmetricDifferenceSelection(selection);
         break;
     default:
         break;
@@ -258,7 +258,7 @@ void KisPixelSelection::intersectSelection(KisPixelSelectionSP selection)
     m_d->invalidateThumbnailImage();
 }
 
-void KisPixelSelection::symmetricdifferenceSelection(KisPixelSelectionSP selection)
+void KisPixelSelection::symmetricDifferenceSelection(KisPixelSelectionSP selection)
 {
     QRect r = selection->selectedRect();
     if (r.isEmpty()) return;
@@ -268,7 +268,7 @@ void KisPixelSelection::symmetricdifferenceSelection(KisPixelSelectionSP selecti
     KisHLineConstIteratorSP src = selection->createHLineConstIteratorNG(r.x(), r.y(), r.width());
     for (int i = 0; i < r.height(); ++i) {
         do {
-            abs(*dst->rawData() - *src->oldRawData());
+            *dst->rawData() = abs(*dst->rawData() - *src->oldRawData());
 
         } while (src->nextPixel() && dst->nextPixel());
         dst->nextRow();
diff --git a/libs/image/kis_pixel_selection.h b/libs/image/kis_pixel_selection.h
index 171642d..afca308 100644
--- a/libs/image/kis_pixel_selection.h
+++ b/libs/image/kis_pixel_selection.h
@@ -156,7 +156,7 @@ private:
     /**
      * Invert a selection or intersect with the inverse of a selection
      */
-    void symmetricdifferenceSelection(KisPixelSelectionSP selection);
+    void symmetricDifferenceSelection(KisPixelSelectionSP selection);
 
 private:
     // We don't want these methods to be used on selections:
diff --git a/libs/ui/tool/kis_selection_tool_helper.cpp b/libs/ui/tool/kis_selection_tool_helper.cpp
index 50281fc..c2cd588 100644
--- a/libs/ui/tool/kis_selection_tool_helper.cpp
+++ b/libs/ui/tool/kis_selection_tool_helper.cpp
@@ -101,12 +101,12 @@ void KisSelectionToolHelper::selectPixelSelection(KisPixelSelectionSP selection,
             KisPixelSelectionSP pixelSelection = m_view->selection()->pixelSelection();
             KIS_ASSERT_RECOVER(pixelSelection) { return 0; }
 
-            bool hasSelection = !pixelSelection->isEmpty();
+            const bool hasSelection = !pixelSelection->isEmpty();
 
             KisSelectionTransaction transaction(pixelSelection);
 
             if (!hasSelection && m_action == SELECTION_SYMMETRICDIFFERENCE) {
-                pixelSelection->invert();
+                m_action = SELECTION_REPLACE;
             }
 
             pixelSelection->applySelection(m_selection, m_action);