diff -up openvas-scanner-3.4+beta2/CMakeLists.txt.bsdsource openvas-scanner-3.4+beta2/CMakeLists.txt
--- openvas-scanner-3.4+beta2/CMakeLists.txt.bsdsource	2014-04-25 12:23:19.000000000 +0200
+++ openvas-scanner-3.4+beta2/CMakeLists.txt	2014-04-25 12:40:02.366598043 +0200
@@ -252,7 +252,7 @@ configure_file (tools/openvas-nvt-sync.i
 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)