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-rw-r--r--cpp/src/IceUtil/Random.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/cpp/src/IceUtil/Random.cpp b/cpp/src/IceUtil/Random.cpp
index a3dc24c5f5e..339cb16016a 100644
--- a/cpp/src/IceUtil/Random.cpp
+++ b/cpp/src/IceUtil/Random.cpp
@@ -13,6 +13,7 @@
# include <Wincrypt.h>
#else
# include <IceUtil/StaticMutex.h>
+# include <unistd.h>
# include <fcntl.h>
#endif