diff --git a/lib/cpp/Makefile.am b/lib/cpp/Makefile.am
index c15cbe0..402a294 100644
--- a/lib/cpp/Makefile.am
+++ b/lib/cpp/Makefile.am
@@ -80,7 +80,8 @@
 # Flags for the various libraries
 libthriftnb_la_CPPFLAGS = $(AM_CPPFLAGS) $(LIBEVENT_CPPFLAGS)
 libthriftz_la_CPPFLAGS  = $(AM_CPPFLAGS) $(ZLIB_CPPFLAGS)
-
+libthriftnb_la_CXXFLAGS = $(AM_CXXFLAGS)
+libthriftz_la_CXXFLAGS  = $(AM_CXXFLAGS)
 
 include_thriftdir = $(includedir)/thrift
 include_thrift_HEADERS = \