--- configure.in.old
+++ configure.in
@@ -506,9 +506,9 @@
   fi
 ])
 
+AC_CHECK_HEADERS(zlib.h)
 if test x$with_zlib = xyes ; then
   SNES9X_FEATURE_NODEP(Gz)
-  AC_CHECK_HEADERS(zlib.h)
   if test $ac_cv_header_zlib_h = yes ; then
     AC_MSG_CHECKING([if zlib.h is new enough])
     AC_TRY_LINK([