diff --git a/lib/PhpStatistics.php b/lib/PhpStatistics.php
index 53e2a475..928d1ed2 100644
--- a/lib/PhpStatistics.php
+++ b/lib/PhpStatistics.php
@@ -112,10 +112,9 @@ protected function getAPCuStatus(): array {
 	/**
 	 * Get all loaded php extensions
 	 *
-	 * @return string as csv list of loaded extensions
+	 * @return array of strings with the names of the loaded extensions
 	 */
-	protected function getLoadedPhpExtensions(): string {
-		$extensions = (function_exists('get_loaded_extensions') ? get_loaded_extensions() : ['Unable to list extensions']);
-		return implode(', ', $extensions);
+	protected function getLoadedPhpExtensions(): ?array {
+		return (function_exists('get_loaded_extensions') ? get_loaded_extensions() : null);
 	}
 }
diff --git a/templates/settings-admin.php b/templates/settings-admin.php
index e4c27130..41695bd3 100644
--- a/templates/settings-admin.php
+++ b/templates/settings-admin.php
@@ -283,7 +283,7 @@ class="barchart"
 						</p>
 						<p>
 							<?php p($l->t('Extensions:')); ?>
-							<em id="phpExtensions"><?php p($_['php']['extensions']); ?></em>
+							<em id="phpExtensions"><?php p($_['php']['extensions'] !== null ? implode(', ', $_['php']['extensions']) : $l->t('Unable to list extensions')); ?></em>
 						</p>
 					</div>
 				</div>