diff --git a/eeschema/sch_io/kicad_sexpr/sch_io_kicad_sexpr.cpp b/eeschema/sch_io/kicad_sexpr/sch_io_kicad_sexpr.cpp
index 98954cdbd9..5d1ba3de97 100644
--- a/eeschema/sch_io/kicad_sexpr/sch_io_kicad_sexpr.cpp
+++ b/eeschema/sch_io/kicad_sexpr/sch_io_kicad_sexpr.cpp
@@ -911,8 +911,13 @@ void SCH_IO_KICAD_SEXPR::saveField( SCH_FIELD* aField )
                                                        aField->GetPosition().y ).c_str(),
                   EDA_UNIT_UTILS::FormatAngle( aField->GetTextAngle() ).c_str() );
 
+    // For 9.0.x versions keep writing the "hide" flag inside "effects".
     if( !aField->IsVisible() )
+    {
+        m_out->Print( "(effects" );
         KICAD_FORMAT::FormatBool( m_out, "hide", true );
+        m_out->Print( ")" );
+    }
 
     if( aField->IsNameShown() )
         KICAD_FORMAT::FormatBool( m_out, "show_name", true );