diff --git a/extract/ExtMain.c b/extract/ExtMain.c
index e81e331e..d9d499f9 100644
--- a/extract/ExtMain.c
+++ b/extract/ExtMain.c
@@ -692,9 +692,9 @@ extExtractStack(stack, doExtract, rootDef)
     /* Replace any modified substrate planes */
     for (; sl; sl = sl->sl_next)
     {
-	// ExtRevertSubstrate(sl->sl_def, sl->sl_plane);
-        DBFreePaintPlane(sl->sl_plane);
-        TiFreePlane(sl->sl_plane);
+	ExtRevertSubstrate(sl->sl_def, sl->sl_plane);
+        // DBFreePaintPlane(sl->sl_plane);
+        // TiFreePlane(sl->sl_plane);
 
 	freeMagic(sl);
     }