diff --git a/contrib/pulse.lua b/contrib/pulse.lua
index b06bf56..663a6ab 100644
--- a/contrib/pulse.lua
+++ b/contrib/pulse.lua
@@ -18,7 +18,8 @@ local string = {
     gmatch = string.gmatch
 }
 local math = {
-    floor = math.floor
+    floor = math.floor,
+    ceil = math.ceil
 }
 -- }}}
 
@@ -99,6 +100,8 @@ function pulse.add(percent, sink)
     if vol > 0x10000 then vol = 0x10000 end
     if vol < 0 then vol = 0 end
 
+    vol = math.ceil(vol)
+
     local cmd = string.format("pacmd set-sink-volume %s 0x%x >/dev/null", sink, vol)
     return os.execute(cmd)
 end