diff --git a/include/jemalloc/internal/jemalloc_internal_types.h b/include/jemalloc/internal/jemalloc_internal_types.h
index 50f9d001..6b987d6f 100644
--- a/include/jemalloc/internal/jemalloc_internal_types.h
+++ b/include/jemalloc/internal/jemalloc_internal_types.h
@@ -79,9 +79,15 @@ typedef int malloc_cpuid_t;
 #  ifdef __hppa__
 #    define LG_QUANTUM		4
 #  endif
+#  ifdef __m68k__
+#    define LG_QUANTUM		3
+#  endif
 #  ifdef __mips__
 #    define LG_QUANTUM		3
 #  endif
+#  ifdef __nios2__
+#    define LG_QUANTUM		3
+#  endif
 #  ifdef __or1k__
 #    define LG_QUANTUM		3
 #  endif
@@ -94,7 +100,8 @@ typedef int malloc_cpuid_t;
 #  ifdef __s390__
 #    define LG_QUANTUM		4
 #  endif
-#  ifdef __SH4__
+#  if (defined (__SH3E__) || defined(__SH4_SINGLE__) || defined(__SH4__) || \
+	defined(__SH4_SINGLE_ONLY__))
 #    define LG_QUANTUM		4
 #  endif
 #  ifdef __tile__