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-rw-r--r--third_party/abseil_cpp/absl/flags/usage_config.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/third_party/abseil_cpp/absl/flags/usage_config.cc b/third_party/abseil_cpp/absl/flags/usage_config.cc
index 0d21bce6a9..ae2f548a57 100644
--- a/third_party/abseil_cpp/absl/flags/usage_config.cc
+++ b/third_party/abseil_cpp/absl/flags/usage_config.cc
@@ -15,6 +15,7 @@
 
 #include "absl/flags/usage_config.h"
 
+#include <functional>
 #include <iostream>
 #include <string>