diff --git a/configure.ac b/configure.ac
index 94533c33..795b5216 100644
--- a/configure.ac
+++ b/configure.ac
@@ -78,7 +78,7 @@ AC_FUNC_MMAP
 ## Required packages
 CHECK_RAGEL
 
-AX_BOOST_BASE
+AX_BOOST_BASE([1.46])
 AX_BOOST_FILESYSTEM
 AX_BOOST_SYSTEM