diff --git a/src/Makefile.am b/src/Makefile.am
index 02a720cfa..0fb302788 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1,4 +1,4 @@
-AM_CPPFLAGS = -fno-rtti -fno-exceptions
+AM_CXXFLAGS = -fno-rtti -fno-exceptions
 
 SUBDIRS = zapit gui daemonc driver system sectionsd timerd nhttpd