diff --git a/api/src/main/java/jakarta/xml/bind/annotation/adapters/HexBinaryAdapter.java b/api/src/main/java/jakarta/xml/bind/annotation/adapters/HexBinaryAdapter.java
index 5a74f80..90c54fe 100644
--- a/api/src/main/java/jakarta/xml/bind/annotation/adapters/HexBinaryAdapter.java
+++ b/api/src/main/java/jakarta/xml/bind/annotation/adapters/HexBinaryAdapter.java
@@ -28,7 +28,7 @@ public HexBinaryAdapter() {}
     @Override
     public byte[] unmarshal(String s) {
         if(s==null)     return null;
-        return DatatypeConverter.parseHexBinary(s);
+        return DatatypeConverter.parseHexBinary(s.trim());
     }
 
     @Override