diff --git a/semantic-conventions/src/opentelemetry/semconv/model/semantic_convention.py b/semantic-conventions/src/opentelemetry/semconv/model/semantic_convention.py
index 5127cd71..b62468b9 100644
--- a/semantic-conventions/src/opentelemetry/semconv/model/semantic_convention.py
+++ b/semantic-conventions/src/opentelemetry/semconv/model/semantic_convention.py
@@ -391,7 +391,7 @@ def _populate_extends_single(self, semconv, unprocessed):
                 raise ValidationError.from_yaml_pos(
                     semconv._position,
                     f"Semantic Convention {semconv.semconv_id} extends "
-                    "{semconv.extends} but the latter cannot be found!",
+                    f"{semconv.extends} but the latter cannot be found!",
                 )
 
             # Process hierarchy chain