diff --git a/exporters/etw/include/opentelemetry/exporters/etw/utils.h b/exporters/etw/include/opentelemetry/exporters/etw/utils.h
index 8b0a015821..22a1c4fffc 100644
--- a/exporters/etw/include/opentelemetry/exporters/etw/utils.h
+++ b/exporters/etw/include/opentelemetry/exporters/etw/utils.h
@@ -193,8 +193,8 @@ static inline GUID GetProviderGuid(const char *providerName)
   guid.Data4[6] = buffer2[14];
   guid.Data4[7] = buffer2[15];
 
-  delete buffer;
-  delete buffer2;
+  delete[] buffer;
+  delete[] buffer2;
 
   return guid;
 }