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-rw-r--r--absl/flags/internal/registry.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/absl/flags/internal/registry.h b/absl/flags/internal/registry.h
index af8ed6b9..f722fd44 100644
--- a/absl/flags/internal/registry.h
+++ b/absl/flags/internal/registry.h
@@ -30,6 +30,8 @@
namespace absl {
ABSL_NAMESPACE_BEGIN
+class CommandLineFlag;
+
namespace flags_internal {
CommandLineFlag* FindCommandLineFlag(absl::string_view name);