diff -Nru openvas-scanner-4.0.7.orig/CMakeLists.txt openvas-scanner-4.0.7/CMakeLists.txt
--- openvas-scanner-4.0.7.orig/CMakeLists.txt	2015-03-04 11:49:44.000000000 +0100
+++ openvas-scanner-4.0.7/CMakeLists.txt	2016-02-06 00:04:50.872602833 +0100
@@ -242,7 +242,7 @@
 set (HARDENING_FLAGS            "-Wformat -Wformat-security -O2 -D_FORTIFY_SOURCE=2 -fstack-protector -Wl,-z,relro -Wl,-z,now")
 
 set (CMAKE_C_FLAGS_DEBUG        "${CMAKE_C_FLAGS_DEBUG} -Werror")
-set (CMAKE_C_FLAGS              "${CMAKE_C_FLAGS} ${HARDENING_FLAGS} -Wall -D_BSD_SOURCE -D_ISOC99_SOURCE -D_SVID_SOURCE")
+set (CMAKE_C_FLAGS              "${CMAKE_C_FLAGS} ${HARDENING_FLAGS} -Wall -D_DEFAULT_SOURCE -D_ISOC99_SOURCE")
 
 add_subdirectory (src)