diff --git a/include/jemalloc/internal/jemalloc_internal.h.in b/include/jemalloc/internal/jemalloc_internal.h.in
index f2cd743f..1c2f3d44 100644
--- a/include/jemalloc/internal/jemalloc_internal.h.in
+++ b/include/jemalloc/internal/jemalloc_internal.h.in
@@ -203,6 +203,9 @@ static const bool config_ivsalloc =
 #  ifdef __mips__
 #    define LG_QUANTUM		3
 #  endif
+#  ifdef __or1k__
+#    define LG_QUANTUM		3
+#  endif
 #  ifdef __powerpc__
 #    define LG_QUANTUM		4
 #  endif