1 files changed, 1 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 46fd9b3..b84b865 100644
--- a/Makefile
+++ b/Makefile
@@ -11,7 +11,7 @@ else
 endif
 
 
-CFLAGS=-Wall -Wdeclaration-after-statement ${INC} ${CPU} -g  -D_XOPEN_SOURCE=600
+CFLAGS=-Wall -Wdeclaration-after-statement ${INC} ${CPU} -g  -D_XOPEN_SOURCE=600 -D_GNU_SOURCE
 CPPFLAGS=-Wall -g
 
 LIBS= ./liblitmus.a