diff --git a/src/voc/OPT.Mod b/src/voc/OPT.Mod
index 2239dce0..2270a143 100644
--- a/src/voc/OPT.Mod
+++ b/src/voc/OPT.Mod
@@ -200,7 +200,7 @@ VAR i: INTEGER;
 BEGIN  (* garbage collection *)
 CloseScope;
 i := 0; WHILE i < maxImps DO GlbMod[i] := NIL; INC(i) END ;
-i := FirstRef; WHILE i < maxStruct DO impCtxt.ref[i] := NIL; impCtxt.old[i] := NIL; INC(i) END
+i := (*FirstRef*)Comp + 1; WHILE i < maxStruct DO impCtxt.ref[i] := NIL; impCtxt.old[i] := NIL; INC(i) END
 END Close;
 
 PROCEDURE FindImport*(mod: Object; VAR res: Object);
diff --git a/voc b/voc
index d2c8d82b..8b5292ff 100755
Binary files a/voc and b/voc differ
diff --git a/vocstatic.linux.gcc.x86_64 b/vocstatic.linux.gcc.x86_64
index d2c8d82b..8b5292ff 100755
Binary files a/vocstatic.linux.gcc.x86_64 and b/vocstatic.linux.gcc.x86_64 differ