diff --git a/configure b/configure
index f6d8415366..a877c2c6b9 100755
--- a/configure
+++ b/configure
@@ -2537,6 +2537,7 @@ case $target_os in
         add_cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_BSD_SOURCE
         ;;
     gnu)
+        add_cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
         ;;
     qnx)
         add_cppflags -D_QNX_SOURCE