diff --git a/opentelemetry/proto/profiles/v1experimental/pprofextended.proto b/opentelemetry/proto/profiles/v1experimental/pprofextended.proto
index bd3008355..7eef5bb8f 100644
--- a/opentelemetry/proto/profiles/v1experimental/pprofextended.proto
+++ b/opentelemetry/proto/profiles/v1experimental/pprofextended.proto
@@ -82,6 +82,11 @@ message Profile {
   repeated Location location = 4;
   // Array of locations referenced by samples.
   repeated int64 location_indices = 15;
+  // Whether addresses within locations have been normalized to be
+  // execution-context agnostic. This is important, because a symbolizer needs
+  // this information to correctly process an address or not prior to
+  // symbolization.
+  bool normalized_addresses = 19;
   // Functions referenced by locations.
   repeated Function function = 5;
   // Lookup table for attributes.