diff --git a/include/wx/gtk/toplevel.h b/include/wx/gtk/toplevel.h
index a95358d88e..602a232aba 100644
--- a/include/wx/gtk/toplevel.h
+++ b/include/wx/gtk/toplevel.h
@@ -112,6 +112,14 @@ public:
     // size of WM decorations
     struct DecorSize
     {
+        DecorSize()
+        {
+            left =
+            right =
+            top =
+            bottom = 0;
+        }
+
         int left, right, top, bottom;
     };
     DecorSize m_decorSize;
diff --git a/src/gtk/minifram.cpp b/src/gtk/minifram.cpp
index 923b8f4b89..2cf63de9c0 100644
--- a/src/gtk/minifram.cpp
+++ b/src/gtk/minifram.cpp
@@ -307,7 +307,6 @@ bool wxMiniFrame::Create( wxWindow *parent, wxWindowID id, const wxString &title
     if (style & wxRESIZE_BORDER)
        m_gdkFunc |= GDK_FUNC_RESIZE;
     gtk_window_set_default_size(GTK_WINDOW(m_widget), m_width, m_height);
-    memset(&m_decorSize, 0, sizeof(m_decorSize));
     m_deferShow = false;
 
     if (m_parent && (GTK_IS_WINDOW(m_parent->m_widget)))
diff --git a/src/gtk/toplevel.cpp b/src/gtk/toplevel.cpp
index 57a457a418..c21d0e427c 100644
--- a/src/gtk/toplevel.cpp
+++ b/src/gtk/toplevel.cpp
@@ -565,7 +565,6 @@ void wxTopLevelWindowGTK::Init()
     m_updateDecorSize = true;
     m_netFrameExtentsTimerId = 0;
     m_incWidth = m_incHeight = 0;
-    memset(&m_decorSize, 0, sizeof(m_decorSize));
 
     m_urgency_hint = -2;
 }