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-rw-r--r--tools/klee/main.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/klee/main.cpp b/tools/klee/main.cpp
index a5b8d046..82ced957 100644
--- a/tools/klee/main.cpp
+++ b/tools/klee/main.cpp
@@ -51,6 +51,7 @@
 #include <fstream>
 #include <cerrno>
 #include <dirent.h>
+#include <unistd.h>
 #include <errno.h>
 #include <sys/stat.h>
 #include <sys/wait.h>