1 files changed, 1 insertions, 1 deletions
diff --git a/configure b/configure
index fb40ef7175..d7747f8dc3 100755
--- a/configure
+++ b/configure
@@ -974,7 +974,7 @@ enable stripping
 vhook="default"
 
 # build settings
-add_cflags -D_ISOC99_SOURCE
+add_cflags -D_ISOC99_SOURCE -D_POSIX_C_SOURCE=200112
 SHFLAGS='-shared -Wl,-soname,$$(@F)'
 VHOOKSHFLAGS='$(SHFLAGS)'
 FFSERVERLDFLAGS=-Wl,-E