diff --git a/imageformats/sai.cpp b/imageformats/sai.cpp
index f55aaa1..f4ba082 100644
--- a/imageformats/sai.cpp
+++ b/imageformats/sai.cpp
@@ -41,6 +41,10 @@ bool SAIHandler::canRead(QIODevice *device)
 
 QImageIOPlugin::Capabilities SAIPlugin::capabilities(QIODevice *device, const QByteArray &format) const
 {
+    if (format == "sai") {
+        return Capabilities(CanRead);
+    }
+
     if (!format.isEmpty()) {
         return {};
     }
@@ -49,7 +53,11 @@ QImageIOPlugin::Capabilities SAIPlugin::capabilities(QIODevice *device, const QB
         return {};
     }
 
-    return Capabilities(CanRead);
+    Capabilities cap;
+    if (device->isReadable() && SAIHandler::canRead(device)) {
+        cap |= CanRead;
+    }
+    return cap;
 }
 
 QImageIOHandler *SAIPlugin::create(QIODevice *device, const QByteArray &format) const