build: fix IWYU error in instruments.h

open-telemetry · Aug 11, 2022 · 9788d34 · 9788d34
1 parent f0109eb
commit 9788d34
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/sdk/include/opentelemetry/sdk/metrics/instruments.h b/sdk/include/opentelemetry/sdk/metrics/instruments.h
@@ -3,6 +3,7 @@
 
 #pragma once
 #ifndef ENABLE_METRICS_PREVIEW
+# include <functional>
 # include "opentelemetry/sdk/common/attribute_utils.h"
 OPENTELEMETRY_BEGIN_NAMESPACE
 namespace sdk