1 files changed, 3 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 9fb8d0b..ac1b803 100644
--- a/Makefile
+++ b/Makefile
@@ -1,13 +1,15 @@
 ##### Available defines for CJSON_CFLAGS #####
 ##
-## USE_INTERNAL_ISINF:      Workaround for Solaris platforms missing isinf().
 ## ENABLE_CJSON_GLOBAL:     Register "cjson" module table as a global variable.
+## USE_INTERNAL_ISINF:      Workaround for Solaris platforms missing isinf().
 ## DISABLE_INVALID_NUMBERS: Permanently disable invalid JSON numbers:
 ##                          NaN, Infinity, hex.
 ##
 ## Optional built-in number conversion uses the following defines:
 ## USE_INTERNAL_DTOA:       Use builtin strtod/dtoa for numeric conversions.
 ## IEEE_BIG_ENDIAN:         Required on big endian architectures.
+## MULTIPLE_THREADS:        Must be set when Lua CJSON may be used in a
+##                          multi-threaded application. Requries _pthreads_.
 
 ##### Build defaults #####
 LUA_VERSION =       5.1