diff --git a/src/pacroller/known_output.py b/src/pacroller/known_output.py
index 65fac4e..de20d0b 100644
--- a/src/pacroller/known_output.py
+++ b/src/pacroller/known_output.py
@@ -50,5 +50,8 @@ KNOWN_PACKAGE_OUTPUT = {
         r'Generation complete\.',
         r'  .*_.*\.\.\. done',
     ],
+    'fontconfig': [
+        r'Rebuilding fontconfig cache\.\.\.',
+    ],
     **KNOWN_PACKAGE_OUTPUT_OVERRIDE
 }