diff --git a/sdk/include/opentelemetry/sdk/metrics/aggregator/gauge_aggregator.h b/sdk/include/opentelemetry/sdk/metrics/aggregator/gauge_aggregator.h
index c74d057bd1..e953e8c619 100644
--- a/sdk/include/opentelemetry/sdk/metrics/aggregator/gauge_aggregator.h
+++ b/sdk/include/opentelemetry/sdk/metrics/aggregator/gauge_aggregator.h
@@ -33,7 +33,7 @@ template <class T>
 class GaugeAggregator : public Aggregator<T>
 {
 public:
-  explicit GaugeAggregator<T>(metrics_api::InstrumentKind kind)
+  explicit GaugeAggregator(metrics_api::InstrumentKind kind)
   {
     static_assert(std::is_arithmetic<T>::value, "Not an arithmetic type");
     this->kind_        = kind;