diff --git a/client.mk b/client.mk
index 69ec076620df5ab215b0336cae78595b5f22271c..8863676bd97be78712a811cd6965600bdfb0e478 100644
--- a/client.mk
+++ b/client.mk
@@ -91,7 +91,12 @@ endif
 TOPSRCDIR = $(CWD)
 endif
 
-AUTOCONF := autoconf-2.13
+ifeq (Darwin,$(shell uname -s))
+AUTOCONF ?= autoconf213
+else
+AUTOCONF ?= autoconf-2.13
+endif
+
 MKDIR := mkdir
 SH := /bin/sh
 ifndef MAKE