diff --git a/shell/shellcorona.cpp b/shell/shellcorona.cpp
index aa7c53ba6b374525b67eff1edc02b5dde00725dd..221c549cf6467a8eca3558a0fc20d1a4afd8cb1d 100644
--- a/shell/shellcorona.cpp
+++ b/shell/shellcorona.cpp
@@ -1126,6 +1126,9 @@ bool ShellCorona::isOutputRedundant(QScreen *screen) const
         if (screen == s) {
             continue;
         }
+        if (s->geometry().isNull()) {
+            return false;
+        }
 
         const QRect otherGeometry = s->geometry();