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--- a/configure.ac
+++ b/configure.ac
@@ -18,10 +18,6 @@
 AC_TYPE_OFF_T
 AC_DEFINE([_LARGE_FILE_SOURCE], [], [Large files support])
 AC_DEFINE([_FILE_OFFSET_BITS], [64], [File Offset size])
-
-AC_DEFINE(HAVE_SHARED_PTR_STD, [1], [Has std::shared_ptr])
-AC_DEFINE(HAVE_CXX0X_UNORDERED, [1], [Has std::unordered_map])
-
 
 #### Libraries
 AC_CHECK_LIB([pthread], [pthread_create], [], [])