diff --git a/src/imageformats/heif.cpp b/src/imageformats/heif.cpp
index d399273..68470a7 100644
--- a/src/imageformats/heif.cpp
+++ b/src/imageformats/heif.cpp
@@ -261,6 +261,11 @@ bool HEIFHandler::canRead(QIODevice *device)
     }
 
     const QByteArray header = device->peek(28);
+    return HEIFHandler::isSupportedBMFFType(header);
+}
+
+bool HEIFHandler::isSupportedBMFFType(const QByteArray &header)
+{
     if (header.size() < 28) {
         return false;
     }
@@ -364,7 +369,7 @@ bool HEIFHandler::ensureDecoder()
     }
 
     const QByteArray buffer = device()->readAll();
-    if (buffer.isEmpty()) {
+    if (!HEIFHandler::isSupportedBMFFType(buffer)) {
         m_parseState = ParseHeicError;
         return false;
     }
diff --git a/src/imageformats/heif_p.h b/src/imageformats/heif_p.h
index dd3e342..c9fcb05 100644
--- a/src/imageformats/heif_p.h
+++ b/src/imageformats/heif_p.h
@@ -10,6 +10,7 @@
 #ifndef KIMG_HEIF_P_H
 #define KIMG_HEIF_P_H
 
+#include <QByteArray>
 #include <QImage>
 #include <QImageIOPlugin>
 
@@ -28,6 +29,7 @@ public:
     void setOption(ImageOption option, const QVariant &value) override;
     bool supportsOption(ImageOption option) const override;
 private:
+    static bool isSupportedBMFFType(const QByteArray &header);
     bool ensureParsed() const;
     bool ensureDecoder();