diff --git a/app/server/ruby/lib/sonicpi/lang/core.rb b/app/server/ruby/lib/sonicpi/lang/core.rb
index fbc98a421c..64507f208e 100644
--- a/app/server/ruby/lib/sonicpi/lang/core.rb
+++ b/app/server/ruby/lib/sonicpi/lang/core.rb
@@ -3669,11 +3669,11 @@ def use_random_source(noise_type, &block)
 
 You can see the 'buckets' that the numbers between 0 and 1 fall into with the following code:
 
-        rand_type :white
+        use_random_source :white
         puts 10000.times.collect { rand.round(1) }.tally.sort
-        rand_type :pink
+        use_random_source :pink
         puts 10000.times.collect { rand.round(1) }.tally.sort
-        rand_type :perlin
+        use_random_source :perlin
         puts 10000.times.collect { rand.round(1) }.tally.sort
 
       ",