diff --git a/src/main/java/eu/openaire/urls_worker/components/plugins/PublicationsRetrieverPlugin.java b/src/main/java/eu/openaire/urls_worker/components/plugins/PublicationsRetrieverPlugin.java
index 864cffd..e8f6dbd 100644
--- a/src/main/java/eu/openaire/urls_worker/components/plugins/PublicationsRetrieverPlugin.java
+++ b/src/main/java/eu/openaire/urls_worker/components/plugins/PublicationsRetrieverPlugin.java
@@ -119,7 +119,7 @@ public class PublicationsRetrieverPlugin {
 
                 String urlToCheck = url;
                 String sourceUrl = urlToCheck;    // Hold it here for the logging-messages.
-                if ( !sourceUrl.contains("#/") && (urlToCheck = URLCanonicalizer.getCanonicalURL(sourceUrl, null, StandardCharsets.UTF_8)) == null ) {
+                if ( !UrlUtils.URL_ACCEPTED_CHARS_TO_AVOID_CANONICALIZATION.matcher(sourceUrl).matches() && ((urlToCheck = URLCanonicalizer.getCanonicalURL(sourceUrl, null, StandardCharsets.UTF_8)) == null) ) {
                     logger.warn("Could not canonicalize url: " + sourceUrl);
                     UrlUtils.logOutputData(id, sourceUrl, null, UrlUtils.unreachableDocOrDatasetUrlIndicator, "Discarded at loading time, due to canonicalization's problems.", null, true, "true", "false", "false", "false", "false", null, null);
                     LoaderAndChecker.connProblematicUrls.incrementAndGet();