diff --git a/common/lib_tree_model_adapter.cpp b/common/lib_tree_model_adapter.cpp
index 4d641b8deb..1716fc8400 100644
--- a/common/lib_tree_model_adapter.cpp
+++ b/common/lib_tree_model_adapter.cpp
@@ -48,7 +48,20 @@ public:
 
     wxSize GetSize() const override
     {
-        return wxSize( GetOwner()->GetWidth(), GetTextExtent( m_text ).y + 2 );
+        wxSize size( GetOwner()->GetWidth(), GetTextExtent( m_text ).y + 2 );
+
+#if defined( __WXGTK__ ) && !wxCHECK_VERSION( 3, 2, 7 )
+        // Somehow returning 0 or negative width prevents the returned height from
+        // being taken into account at all, even if we return strictly positive
+        // width from later calls to GetSize(), meaning that it's enough to return
+        // 0 from it once to completely break the layout for the entire lifetime of
+        // the control.
+        //
+        // As this is completely unexpected, forcefully prevent this from happening
+        size.IncTo( wxSize( 1, 1 ) );
+#endif
+
+        return size;
     }
 
     bool GetValue( wxVariant& aValue ) const override