diff --git a/printrun/printcore.py b/printrun/printcore.py
index 5f0f65bed..f67c83971 100644
--- a/printrun/printcore.py
+++ b/printrun/printcore.py
@@ -334,7 +334,7 @@ def _readline(self):
             if line_bytes is PR_EOF:
                 self.logError(_("Can't read from printer (disconnected?). line_bytes is None"))
                 return PR_EOF
-            line = line_bytes.decode('ascii')
+            line = line_bytes.decode('utf-8')
 
             if len(line) > 1:
                 self.log.append(line)