1 files changed, 4 insertions, 4 deletions
diff --git a/doc/bus.5 b/doc/bus.5
index 2fcb8ba..4c2e7a1 100644
--- a/doc/bus.5
+++ b/doc/bus.5
@@ -17,16 +17,16 @@ either:
 For the bus used in generic cases. That is all but the cases of the
 buses listed below.
 .TP
-.IR AUDIO
+.B AUDIO
 For the bus used in with the audio subsystem is involved.
 .TP
-.IR VIDEO
+.B VIDEO
 For the bus used in with the video subsystem is involved.
 .TP
-.IR INPUT
+.B INPUT
 For the bus used in with the input subsystem is involved.
 .TP
-.IR FILES
+.B FILES
 For the bus used in with the storage subsystem is involved.
 .PP
 Messages broadcasted on a bus cannot be longer than 2047 bytes,