diff --git a/sdk/include/opentelemetry/sdk/metrics/instruments.h b/sdk/include/opentelemetry/sdk/metrics/instruments.h
index f377495eed..76ad07b2e3 100644
--- a/sdk/include/opentelemetry/sdk/metrics/instruments.h
+++ b/sdk/include/opentelemetry/sdk/metrics/instruments.h
@@ -19,10 +19,10 @@ enum class InstrumentType
   kCounter,
   kHistogram,
   kUpDownCounter,
-  kGauge,
   kObservableCounter,
   kObservableGauge,
-  kObservableUpDownCounter
+  kObservableUpDownCounter,
+  kGauge
 };
 
 enum class InstrumentClass