diff --git a/src/common/util.cpp b/src/common/util.cpp
index 2a1d49af0..7d8c9aa99 100644
--- a/src/common/util.cpp
+++ b/src/common/util.cpp
@@ -233,7 +233,7 @@ namespace tools
       MERROR("Failed to open " << filename << ": " << std::error_code(GetLastError(), std::system_category()));
     }
 #else
-    m_fd = open(filename.c_str(), O_RDONLY | O_CREAT, 0666);
+    m_fd = open(filename.c_str(), O_RDONLY | O_CREAT | O_CLOEXEC, 0666);
     if (m_fd != -1)
     {
       if (flock(m_fd, LOCK_EX | LOCK_NB) == -1)