diff --git a/src/claim.js b/src/claim.js
index f8298e2..f6d9bfa 100644
--- a/src/claim.js
+++ b/src/claim.js
@@ -169,6 +169,11 @@ class Claim {
       }
 
       const candidate = def.processURI(this._uri)
+      // If the candidate could not be processed, continue matching
+      if (!candidate) {
+        return true
+      }
+
       if (candidate.match.isAmbiguous) {
         // Add to the possible candidates
         this._matches.push(candidate)