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-rw-r--r--Makefile.am2
1 files changed, 1 insertions, 1 deletions
diff --git a/Makefile.am b/Makefile.am
index 0ddafc1..6637a7a 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -23,7 +23,7 @@ AM_YFLAGS = -d
bin_PROGRAMS = xgc
-xgc_CFLAGS = $(DEP_CFLAGS)
+xgc_CFLAGS = $(DEP_CFLAGS) -D_BSD_SOURCE
xgc_LDADD = $(DEP_LIBS) -lm
xgc_SOURCES = \