--- libnsfb-0.1.2/Makefile
+++ libnsfb-0.1.2/Makefile
@@ -20,8 +20,8 @@
 # would like these flags but gcc earlier than 4.4 fail
 #-pedantic -Wno-overlength-strings # For nsglobe.c
 
-CFLAGS := -g -std=c99 -D_BSD_SOURCE -D_POSIX_C_SOURCE=200112L \
-	-I$(CURDIR)/include/ -I$(CURDIR)/src $(WARNFLAGS) $(CFLAGS) -Wno-error
+CFLAGS := -g -std=c99 -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112L \
+	-I$(CURDIR)/include/ -I$(CURDIR)/src $(WARNFLAGS) $(CFLAGS)
 
 NSFB_XCB_PKG_NAMES := xcb xcb-icccm xcb-image xcb-keysyms xcb-atom