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-rw-r--r--absl/flags/usage_config.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/absl/flags/usage_config.cc b/absl/flags/usage_config.cc
index 0d21bce6..ae2f548a 100644
--- a/absl/flags/usage_config.cc
+++ b/absl/flags/usage_config.cc
@@ -15,6 +15,7 @@
#include "absl/flags/usage_config.h"
+#include <functional>
#include <iostream>
#include <string>