diff --git a/extensions/trace-propagators/src/main/java/io/opentelemetry/extension/trace/propagation/OtTracerPropagator.java b/extensions/trace-propagators/src/main/java/io/opentelemetry/extension/trace/propagation/OtTracerPropagator.java
index 499ca4fc74..210c84cc19 100644
--- a/extensions/trace-propagators/src/main/java/io/opentelemetry/extension/trace/propagation/OtTracerPropagator.java
+++ b/extensions/trace-propagators/src/main/java/io/opentelemetry/extension/trace/propagation/OtTracerPropagator.java
@@ -58,7 +58,12 @@ public final class OtTracerPropagator implements TextMapPropagator {
     if (!spanContext.isValid()) {
       return;
     }
-    setter.set(carrier, TRACE_ID_HEADER, spanContext.getTraceIdAsHexString());
+    // Lightstep trace id MUST be 64-bits therefore OpenTelemetry trace id is truncated to 64-bits
+    // by retaining least significant (right-most) bits.
+    setter.set(
+        carrier,
+        TRACE_ID_HEADER,
+        spanContext.getTraceIdAsHexString().substring(TraceId.getHexLength() / 2));
     setter.set(carrier, SPAN_ID_HEADER, spanContext.getSpanIdAsHexString());
     setter.set(carrier, SAMPLED_HEADER, String.valueOf(spanContext.isSampled()));
   }
diff --git a/extensions/trace-propagators/src/test/java/io/opentelemetry/extension/trace/propagation/OtTracerPropagatorTest.java b/extensions/trace-propagators/src/test/java/io/opentelemetry/extension/trace/propagation/OtTracerPropagatorTest.java
index e2f0ea8424..8ee1347147 100644
--- a/extensions/trace-propagators/src/test/java/io/opentelemetry/extension/trace/propagation/OtTracerPropagatorTest.java
+++ b/extensions/trace-propagators/src/test/java/io/opentelemetry/extension/trace/propagation/OtTracerPropagatorTest.java
@@ -27,6 +27,7 @@ class OtTracerPropagatorTest {
 
   private static final TraceState TRACE_STATE_DEFAULT = TraceState.builder().build();
   private static final String TRACE_ID = "ff000000000000000000000000000041";
+  private static final String TRACE_ID_RIGHT_PART = "0000000000000041";
   private static final String SHORT_TRACE_ID = "ff00000000000000";
   private static final String SHORT_TRACE_ID_FULL = "0000000000000000ff00000000000000";
   private static final String SPAN_ID = "ff00000000000041";
@@ -80,7 +81,7 @@ class OtTracerPropagatorTest {
             Context.current()),
         carrier,
         setter);
-    assertThat(carrier).containsEntry(OtTracerPropagator.TRACE_ID_HEADER, TRACE_ID);
+    assertThat(carrier).containsEntry(OtTracerPropagator.TRACE_ID_HEADER, TRACE_ID_RIGHT_PART);
     assertThat(carrier).containsEntry(OtTracerPropagator.SPAN_ID_HEADER, SPAN_ID);
     assertThat(carrier).containsEntry(OtTracerPropagator.SAMPLED_HEADER, "true");
   }
@@ -94,7 +95,7 @@ class OtTracerPropagatorTest {
             Context.current()),
         null,
         (Setter<Map<String, String>>) (ignored, key, value) -> carrier.put(key, value));
-    assertThat(carrier).containsEntry(OtTracerPropagator.TRACE_ID_HEADER, TRACE_ID);
+    assertThat(carrier).containsEntry(OtTracerPropagator.TRACE_ID_HEADER, TRACE_ID_RIGHT_PART);
     assertThat(carrier).containsEntry(OtTracerPropagator.SPAN_ID_HEADER, SPAN_ID);
     assertThat(carrier).containsEntry(OtTracerPropagator.SAMPLED_HEADER, "true");
   }
@@ -108,7 +109,7 @@ class OtTracerPropagatorTest {
             Context.current()),
         carrier,
         setter);
-    assertThat(carrier).containsEntry(OtTracerPropagator.TRACE_ID_HEADER, TRACE_ID);
+    assertThat(carrier).containsEntry(OtTracerPropagator.TRACE_ID_HEADER, TRACE_ID_RIGHT_PART);
     assertThat(carrier).containsEntry(OtTracerPropagator.SPAN_ID_HEADER, SPAN_ID);
     assertThat(carrier).containsEntry(OtTracerPropagator.SAMPLED_HEADER, "false");
   }