--- jbig2dec.old/jbig2.h
+++ jbig2dec/jbig2.h
@@ -29,6 +29,9 @@
  * predefine MEMENTO whilst building. */
 /* #define MEMENTO */
 
+#undef MEMENTO
+#define JBIG_NO_MEMENTO 1
+
 /* SumatraPDF: allow to build without MEMENTO (clashes with MuPDF's) */
 #ifndef JBIG_NO_MEMENTO
 /* If we are building as part of GS then make sure we use the version