diff --git a/etc/rtpengine-recording.sample.conf b/etc/rtpengine-recording.sample.conf
index 7a0062a08..f29eb5876 100644
--- a/etc/rtpengine-recording.sample.conf
+++ b/etc/rtpengine-recording.sample.conf
@@ -27,10 +27,10 @@ table = 0
 # mp3_bitrate = 24000
 
 ### mix participating sources into a single output
-# output-mixed = 1
+# output-mixed = true
 
 ### create one output file for each source
-# output-single = 1
+# output-single = true
 
 ### mysql configuration for db storage
 # mysql-host = localhost