diff --git a/Platform/linux.mk b/Platform/linux.mk
index 7c2b603..41d8e41 100644
--- a/Platform/linux.mk
+++ b/Platform/linux.mk
@@ -2,7 +2,7 @@
 
 CC = cc
 AR = ar
-CFLAGS = -g -std=c99 -DPREFIX=\"$(PREFIX)\" -I $(PWD)/Common -D_DEFAULT_SOURCE -fPIC
+CFLAGS = -g -std=c99 -DPREFIX=\"$(PREFIX)\" -I $(PWD)/Common -D_DEFAULT_SOURCE -fPIC -D_XOPEN_SOURCE=600
 LDFLAGS =
 LIBS =
 EXEC =