diff --git a/configure.ac b/configure.ac
index 3a24053bb6a1bdc9b15b313e4a6187ea06d3fcbc..1b99702fedffe06fdb25b1c46a159225550cdbb8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -55,8 +55,6 @@ if test "$sys_name" = sunos; then
 fi
 
 
-CFLAGS=
-CXXFLAGS=
 AC_PROG_CC
 AC_PROG_CXX