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-rw-r--r--klm/lm/build_binary.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/klm/lm/build_binary.cc b/klm/lm/build_binary.cc
index 49901c9e..c2ca1101 100644
--- a/klm/lm/build_binary.cc
+++ b/klm/lm/build_binary.cc
@@ -8,6 +8,7 @@
#include <math.h>
#include <stdlib.h>
+#include <unistd.h>
#ifdef WIN32
#include "util/getopt.hh"