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-rw-r--r--libs/ezsat/ezminisat.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/libs/ezsat/ezminisat.cc b/libs/ezsat/ezminisat.cc
index 3f43f3ec..dc4e5d28 100644
--- a/libs/ezsat/ezminisat.cc
+++ b/libs/ezsat/ezminisat.cc
@@ -27,6 +27,7 @@
#include <stdint.h>
#include <csignal>
#include <cinttypes>
+#include <unistd.h>
#include "../minisat/Solver.h"
#include "../minisat/SimpSolver.h"