--- a/configure.ac	2014-02-13 04:50:45.000000000 +0400
+++ b/configure.ac	2014-12-07 12:13:17.346849284 +0300
@@ -64,7 +64,7 @@
 
 LT_INIT
 
-CFLAGS="-Wall $CFLAGS -g -fno-strict-aliasing -fstack-protector-all -D_FORTIFY_SOURCE=2 -O1 -Wl,-z,relro,-z,now -fPIE -pie $PACKAGE_CFLAGS"
+CFLAGS="-Wall $CFLAGS -g -fno-strict-aliasing -fstack-protector-all -D_FORTIFY_SOURCE=2 -Wl,-z,relro,-z,now -fPIE -pie $PACKAGE_CFLAGS"
 
 DEFAULT_INCLUDES="-I\$(top_srcdir) -I\$(top_builddir) -I\$(top_builddir)/src -I\$(top_builddir)/include"
 AC_SUBST(DEFAULT_INCLUDES)