diff --git a/shell_client.cpp b/shell_client.cpp
index 7a2387bcd6..53a497d10f 100644
--- a/shell_client.cpp
+++ b/shell_client.cpp
@@ -1184,7 +1184,7 @@ void ShellClient::requestGeometry(const QRect &rect)
     configureRequest.maximizeMode = m_requestedMaximizeMode;
 
     const QSize size = rect.size() - QSize(borderLeft() + borderRight(), borderTop() + borderBottom());
-    m_requestedClientSize = size;
+    m_requestedClientSize = QSize(0, 0);
 
     if (m_shellSurface) {
         m_shellSurface->requestSize(size);
diff --git a/shell_client.h b/shell_client.h
index a29a62377c..15e9286892 100644
--- a/shell_client.h
+++ b/shell_client.h
@@ -220,7 +220,7 @@ private:
     QSize m_clientSize;
     // last size we requested or empty if we haven't sent an explicit request to the client
     // if empty the client should choose their own default size
-    QSize m_requestedClientSize;
+    QSize m_requestedClientSize = QSize(0, 0);
 
     struct PendingConfigureRequest {
         //note for wl_shell we have no serial, so serialId and m_lastAckedConfigureRequest will always be 0