diff -up jemalloc-2.0.1/include/jemalloc/internal/jemalloc_internal.h.in.orig jemalloc-2.0.1/include/jemalloc/internal/jemalloc_internal.h.in
--- jemalloc-2.0.1/include/jemalloc/internal/jemalloc_internal.h.in.orig 2010-12-11 14:23:59.000000000 +0100
+++ jemalloc-2.0.1/include/jemalloc/internal/jemalloc_internal.h.in 2010-12-11 14:24:04.000000000 +0100
@@ -135,7 +135,7 @@ extern void (*JEMALLOC_P(malloc_message)
#ifdef __powerpc__
# define LG_QUANTUM 4
#endif
-#ifdef __s390x__
+#ifdef __s390__
# define LG_QUANTUM 4
#endif