1 files changed, 1 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index f371a28..9cd4d96 100644
--- a/Makefile
+++ b/Makefile
@@ -33,7 +33,7 @@ EXE_test = uri_test
 TRANS = fr.mo pt_BR.mo
 DOCS  = usr.bin.badwolf README.md KnowledgeBase.md interface.txt
 
-CDEPS = -DDATADIR=\"$(DATADIR)\" -DPACKAGE=\"$(PACKAGE)\" -D_POSIX_C_SOURCE=200809L -DVERSION=\"$(VERSION_FULL)\"
+CDEPS = -DDATADIR=\"$(DATADIR)\" -DPACKAGE=\"$(PACKAGE)\" -D_XOPEN_SOURCE=500 -D_POSIX_C_SOURCE=200809L -DVERSION=\"$(VERSION_FULL)\"
 CDEPS += `$(PKGCONFIG) --cflags $(DEPS)`
 LIBS   = `$(PKGCONFIG) --libs $(DEPS)`