diff --git a/autotests/kerfuffle/archivetest.cpp b/autotests/kerfuffle/archivetest.cpp
--- a/autotests/kerfuffle/archivetest.cpp
+++ b/autotests/kerfuffle/archivetest.cpp
@@ -161,6 +161,12 @@
     } else {
         qDebug() << "lrzip executable not found in path. Skipping lrzip test.";
     }
+
+    QTest::newRow("mimetype child of application/zip")
+            << QFINDTESTDATA("data/test.odt")
+            << QStringLiteral("test")
+            << false << true << false << Archive::Unencrypted
+            << QStringLiteral("test");
 }
 
 void ArchiveTest::testProperties()
diff --git a/autotests/kerfuffle/data/test.odt b/autotests/kerfuffle/data/test.odt
new file mode 100644
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000
GIT binary patch
literal 0
Hc$@<O00001

literal 0
Hc$@<O00001

diff --git a/kerfuffle/archive_kerfuffle.cpp b/kerfuffle/archive_kerfuffle.cpp
--- a/kerfuffle/archive_kerfuffle.cpp
+++ b/kerfuffle/archive_kerfuffle.cpp
@@ -36,6 +36,7 @@
 #include <QEventLoop>
 #include <QFile>
 #include <QFileInfo>
+#include <QMimeDatabase>
 
 #include <KPluginFactory>
 #include <KPluginLoader>
@@ -57,8 +58,24 @@
     qCDebug(ARK) << "Detected mime" << mimeType;
 
     QVector<KPluginMetaData> offers = KPluginLoader::findPlugins(QStringLiteral("kerfuffle"), [mimeType](const KPluginMetaData& metaData) {
-        return metaData.serviceTypes().contains(QStringLiteral("Kerfuffle/Plugin")) &&
-               metaData.mimeTypes().contains(mimeType);
+        if (!metaData.serviceTypes().contains(QStringLiteral("Kerfuffle/Plugin"))) {
+            return false;
+        }
+
+        if (metaData.mimeTypes().contains(mimeType)) {
+            return true;
+        }
+
+        // The mimetype is not directly supported, but it could inherit from a supported one.
+        if (!supportedMimeTypes().contains(mimeType)) {
+            foreach (const QString &mime, metaData.mimeTypes()) {
+                if (QMimeDatabase().mimeTypeForName(mimeType).inherits(mime)) {
+                    return true;
+                }
+            }
+        }
+
+        return false;
     });
 
     qSort(offers.begin(), offers.end(), comparePlugins);