diff --git a/inc/Service/Media/LibMagickMediaHandler.php b/inc/Service/Media/LibMagickMediaHandler.php
index 5f554373..ba9d6886 100644
--- a/inc/Service/Media/LibMagickMediaHandler.php
+++ b/inc/Service/Media/LibMagickMediaHandler.php
@@ -82,7 +82,6 @@ class LibMagickMediaHandler implements MediaHandler {
 
 	private function generateThumbImpl(
 		\Imagick $imagick,
-		string $source_file_path,
 		string $source_file_mime,
 		string $preferred_out_file_dir,
 		string $preferred_out_file_name,
@@ -196,8 +195,9 @@ class LibMagickMediaHandler implements MediaHandler {
 		if ($ext === null) {
 			return false;
 		}
+		$ext = \strtoupper($ext);
 
-		return !empty(\Imagick::queryFormats(\strtoupper($ext)));
+		return !empty(\Imagick::queryFormats("$ext*"));
 	}
 
 	public function openHandle(string $file_path, string $file_mime, int $file_kind): mixed {
@@ -256,7 +256,6 @@ class LibMagickMediaHandler implements MediaHandler {
 
 			return self::generateThumbImpl(
 				$imagick,
-				$source_file_path,
 				$source_file_mime,
 				$preferred_out_file_dir,
 				$preferred_out_file_name,