diff --git a/lib/cpp/test/Makefile.am b/lib/cpp/test/Makefile.am
index feff930..95d9889 100755
--- a/lib/cpp/test/Makefile.am
+++ b/lib/cpp/test/Makefile.am
@@ -389,7 +389,7 @@
 gen-cpp/ChildService.cpp gen-cpp/ChildService.h gen-cpp/ParentService.cpp gen-cpp/ParentService.h gen-cpp/proc_types.cpp gen-cpp/proc_types.h: processor/proc.thrift
 	$(THRIFT) --gen cpp:templates,cob_style $<
 
-AM_CPPFLAGS = $(BOOST_CPPFLAGS) -I$(top_srcdir)/lib/cpp/src -D__STDC_LIMIT_MACROS -I.
+AM_CPPFLAGS = $(BOOST_CPPFLAGS) -I$(top_srcdir)/lib/cpp/src -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I.
 AM_LDFLAGS = $(BOOST_LDFLAGS)
 AM_CXXFLAGS = -Wall -Wextra -pedantic