diff --git a/Rakefile b/Rakefile
index 8c409a187e..5c139d6954 100644
--- a/Rakefile
+++ b/Rakefile
@@ -191,7 +191,7 @@ task :spec do
   puts <<-EOM
 
   The spec and spec:xxx commands are deprecated (and removed).
-  Use bin/mspec directly. MSpec provides 'psuedo-directories',
+  Use bin/mspec directly. MSpec provides 'pseudo-directories',
   which are labels that refer to sets of specs to run. Refer
   to spec/default.mspec, spec/full.mspec and the MSpec docs
   for full details.
diff --git a/doc/vm/slots.txt b/doc/vm/slots.txt
index 121e20de84..f920e1ce22 100644
--- a/doc/vm/slots.txt
+++ b/doc/vm/slots.txt
@@ -1,7 +1,7 @@
 # Slots
 
 "Slots" are the name given to members of C++ classes that are available as
-psuedo instance variables in the Ruby classes. For example,
+pseudo instance variables in the Ruby classes. For example,
 vm/builtin/exception.hpp has the following member:
 
   private: