diff --git a/extract-lib/src/main/java/org/icij/extract/extractor/EmbeddedDocumentMemoryExtractor.java b/extract-lib/src/main/java/org/icij/extract/extractor/EmbeddedDocumentMemoryExtractor.java
index 6abd33a..3bc50e0 100644
--- a/extract-lib/src/main/java/org/icij/extract/extractor/EmbeddedDocumentMemoryExtractor.java
+++ b/extract-lib/src/main/java/org/icij/extract/extractor/EmbeddedDocumentMemoryExtractor.java
@@ -79,7 +79,9 @@ public void delegateParsing(InputStream stream, ContentHandler handler, Metadata
                     }
                 }
                 digester.digest(tis, metadata, context);
-                tis.reset();
+                if (stream.getClass().cast(stream).markSupported()) { // Avoid mark/reset error for unsupported inputstreams
+                    tis.reset();
+                }
                 String digest;
                 try {
                     digest = new DigestIdentifier(algorithm, Charset.defaultCharset()).generateForEmbed(embed);