--- urbackup-client-2.1.7.0/Makefile.in.orig	2016-12-15 19:25:03.000000000 +0000
+++ urbackup-client-2.1.7.0/Makefile.in	2016-12-17 06:33:28.964735108 +0000
@@ -939,7 +939,7 @@
 	fileservplugin/PipeFileBase.cpp \
 	fileservplugin/FileMetadataPipe.cpp \
 	fileservplugin/PipeFileTar.cpp
-@WITH_FORTIFY_TRUE@FORTIFY_FLAGS = -fstack-protector-strong --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -fPIE
+@WITH_FORTIFY_TRUE@FORTIFY_FLAGS = -fstack-protector-strong --param=ssp-buffer-size=4 -Wformat -Werror=format-security -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fPIE
 @WITH_FORTIFY_TRUE@FORTIFY_ldflags = -Wl,-z,relro
 urbackupclientbackend_LDADD = $(PTHREAD_LIBS) $(DLOPEN_LIBS) \
 	$(am__append_2)