diff --git a/src/request/otel.rs b/src/request/otel.rs
index c3b2ef3..f9758e2 100644
--- a/src/request/otel.rs
+++ b/src/request/otel.rs
@@ -1,3 +1,4 @@
+#[cfg(not(feature = "tracing_opentelemetry_0_21"))]
 #[cfg(feature = "tracing_opentelemetry_0_20")]
 mod otel_0_20 {
     pub use opentelemetry_0_20_pkg::{