--- a/configure.ac
+++ b/configure.ac
@@ -52,8 +52,6 @@
 ])
 
 dnl Rmath stuff
-
-AC_DEFINE(MATHLIB_STANDALONE, 1, [Define if you have standalone R math library])
 
 dnl Relevant parts lifted from R's configure.ac, version 2.3.0
 AC_CHECK_LIB(m, sin)