--- vorbis.m4
+++ vorbis.m4
@@ -18,9 +18,9 @@
   if test "x$vorbis_libraries" != "x" ; then
     VORBIS_LIBS="-L$vorbis_libraries"
   elif test "x$vorbis_prefix" != "x" ; then
-    VORBIS_LIBS="-L$vorbis_prefix/lib"
+    VORBIS_LIBS="-L$vorbis_prefix/lib64"
   elif test "x$prefix" != "xNONE" -a "x$prefix" != "x/usr"; then
-    VORBIS_LIBS="-L$prefix/lib"
+    VORBIS_LIBS="-L$prefix/lib64"
   fi
 
   VORBIS_LIBS="$VORBIS_LIBS -lvorbis -lm"