diff --git a/apps/theming/lib/ImageManager.php b/apps/theming/lib/ImageManager.php
index 58879a9b4717549b487985245131ccb0e2ab82ac..8c144bfe6ae6e75652906c55e9d366d3ec168826 100644
--- a/apps/theming/lib/ImageManager.php
+++ b/apps/theming/lib/ImageManager.php
@@ -117,7 +117,7 @@ class ImageManager {
 					$pngFile = $folder->newFile($key . '.png');
 					$pngFile->putContent($finalIconFile->getImageBlob());
 				} catch (\ImagickException $e) {
-					$this->logger->info('The image was requested to be no SVG file, but converting it to PNG failed.', [$e->getMessage()]);
+					$this->logger->info('The image was requested to be no SVG file, but converting it to PNG failed: ' . $e->getMessage());
 					$pngFile = null;
 				}
 			} else {