diff --git a/kdecoration/oxygendecoration.cpp b/kdecoration/oxygendecoration.cpp
--- a/kdecoration/oxygendecoration.cpp
+++ b/kdecoration/oxygendecoration.cpp
@@ -373,22 +373,28 @@
 
         setBorders(QMargins(left, top, right, bottom));
 
-        // extended sizes
-        const int extSize = s->largeSpacing();
-        int extSides = 0;
-        int extBottom = 0;
-        if( hasNoBorders() )
-        {
-            extSides = extSize;
-            extBottom = extSize;
-
-        } else if( hasNoSideBorders() ) {
-
-            extSides = extSize;
-
+        // Specifies the extent of resizable area outside the client.
+        const int resizeExtent = s->largeSpacing();
+
+        // Typically decoration borders are used as resize handles, but if either
+        // one of them is missing (because user chose No Border size, for example),
+        // we need to set corresponding resize only border, otherwise the user
+        // won't be able to resize the client along the edge of the missing border.
+        // Even though shaded clients can't be resized, we still want to unset resize
+        // only borders in order to avoid the dead zone around the client.
+        QMargins resizeBorders;
+        if (!c->isShaded()) {
+            if (hasNoBorders()) {
+                resizeBorders.setLeft(isMaximizedHorizontally() || testFlag(Qt::LeftEdge) ? 0 : resizeExtent);
+                resizeBorders.setRight(isMaximizedHorizontally() || testFlag(Qt::RightEdge) ? 0 : resizeExtent);
+                resizeBorders.setBottom(isMaximizedVertically() || testFlag(Qt::BottomEdge) ? 0 : resizeExtent);
+            } else if (hasNoSideBorders()) {
+                resizeBorders.setLeft(isMaximizedHorizontally() || testFlag(Qt::LeftEdge) ? 0 : resizeExtent);
+                resizeBorders.setRight(isMaximizedHorizontally() || testFlag(Qt::RightEdge) ? 0 : resizeExtent);
+            }
         }
 
-        setResizeOnlyBorders(QMargins(extSides, 0, extSides, extBottom));
+        setResizeOnlyBorders(resizeBorders);
     }
 
     //________________________________________________________________