diff --git a/eeschema/files-io.cpp b/eeschema/files-io.cpp
index c575363b57..ae36434aa3 100644
--- a/eeschema/files-io.cpp
+++ b/eeschema/files-io.cpp
@@ -491,8 +491,11 @@ bool SCH_EDIT_FRAME::OpenProjectFiles( const std::vector<wxString>& aFileSet, in
             for( SCH_SCREEN* screen = schematic.GetFirst(); screen; screen = schematic.GetNext() )
                 screen->MigrateSimModels();
 
-            // Allow the schematic to be saved to new file format without making any edits.
-            OnModify();
+            if( schematic.GetFirst()->GetFileFormatVersionAtLoad() < SEXPR_SCHEMATIC_FILE_VERSION )
+            {
+                // Allow the schematic to be saved to new file format without making any edits.
+                OnModify();
+            }
         }
 
         Schematic().ConnectionGraph()->Reset();