diff --git a/lib/datadog/opentelemetry/sdk/propagator.rb b/lib/datadog/opentelemetry/sdk/propagator.rb
index 9b913551a6d..aa2f6577c5f 100644
--- a/lib/datadog/opentelemetry/sdk/propagator.rb
+++ b/lib/datadog/opentelemetry/sdk/propagator.rb
@@ -43,7 +43,7 @@ def extract(
 
           # Converts the {Numeric} Datadog id object to OpenTelemetry's byte array format.
           trace_id = [format('%032x', digest.trace_id)].pack('H32')
-          span_id = [format('%016x', digest.trace_id)].pack('H16')
+          span_id = [format('%016x', digest.span_id)].pack('H16')
 
           if digest.trace_state || digest.trace_flags
             trace_flags = ::OpenTelemetry::Trace::TraceFlags.from_byte(digest.trace_flags)