diff --git a/SConstruct b/SConstruct
index f48cb87..b2d62e0 100644
--- a/SConstruct
+++ b/SConstruct
@@ -92,6 +92,8 @@ if conf.CheckFunc('setsid'):
     conf.env.Append(CPPFLAGS = '-DHAVE_SETSID')
 if conf.CheckCHeader('unistd.h'):
     env.Append(CPPFLAGS = '-DHAVE_UNISTD_H')
+if conf.CheckCHeader('limits.h'):
+    conf.env.Append(CPPFLAGS = '-DHAVE_LIMITS_H')    
 env.Append(CPPFLAGS = '-DSIZEOF_CHAR='+conf.sizeOf("char"))
 env.Append(CPPFLAGS = '-DSIZEOF_LONG='+conf.sizeOf("long"))
 env.Append(CPPFLAGS = '-DSIZEOF_SHORT='+conf.sizeOf("short"))