diff --git a/configure.ac b/configure.ac
index 64f87bb..68cda7c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,7 +1,6 @@
 AC_INIT([libsirocco], [2.0], [mmarco@unizar.es])
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_MACRO_DIR([m4])
-: ${CXXFLAGS=-O0 -g}
 AM_INIT_AUTOMAKE([foreign -Wall])
 AM_PROG_AR
 AC_PROG_CXX