diff --git a/brave/propagation-aws/src/main/java/brave/propagation/aws/AWSExtractor.java b/brave/propagation-aws/src/main/java/brave/propagation/aws/AWSExtractor.java
index ffbf9c1b..a5736022 100644
--- a/brave/propagation-aws/src/main/java/brave/propagation/aws/AWSExtractor.java
+++ b/brave/propagation-aws/src/main/java/brave/propagation/aws/AWSExtractor.java
@@ -124,6 +124,7 @@ public TraceContextOrSamplingFlags extract(R request) {
             } else if (c >= 'a' && c <= 'f') {
               traceIdHigh |= c - 'a' + 10;
             } else {
+              traceIdHigh = 0L;
               break OUTER; // invalid format
             }
           }
@@ -136,6 +137,8 @@ public TraceContextOrSamplingFlags extract(R request) {
             } else if (c >= 'a' && c <= 'f') {
               traceId |= c - 'a' + 10;
             } else {
+              traceIdHigh = 0L;
+              traceId = 0L;
               break OUTER; // invalid format
             }
           }
diff --git a/brave/propagation-aws/src/test/java/brave/propagation/aws/AWSPropagationTest.java b/brave/propagation-aws/src/test/java/brave/propagation/aws/AWSPropagationTest.java
index a013ada3..4975c0f0 100644
--- a/brave/propagation-aws/src/test/java/brave/propagation/aws/AWSPropagationTest.java
+++ b/brave/propagation-aws/src/test/java/brave/propagation/aws/AWSPropagationTest.java
@@ -296,4 +296,18 @@ public void extract_skips_really_malformed() {
 
     assertThat(extractor.extract(carrier).samplingFlags()).isEqualTo(SamplingFlags.EMPTY);
   }
+
+  @Test
+  public void extract_malformed_check_not_throws_exception_different_length() {
+    carrier.put("x-amzn-trace-id", "Root=1-1373cbb-77f4b48ed7ff3eebbd62b5e01;Parent=1a4e96536a3ff131;Sampled=0");
+
+    assertThat(extractor.extract(carrier).samplingFlags()).isEqualTo(SamplingFlags.EMPTY);
+  }
+
+  @Test
+  public void extract_malformed_throws_exception_not_hexadecimal_value() {
+    carrier.put("x-amzn-trace-id", "Root=1-1z373cbb-77f4b48ed7ff3eebbd62b5e01;Parent=1a4e96536a3ff131;Sampled=0");
+
+    assertThat(extractor.extract(carrier).samplingFlags()).isEqualTo(SamplingFlags.EMPTY);
+  }
 }