diff --git a/docs/hazmat/primitives/key-derivation-functions.rst b/docs/hazmat/primitives/key-derivation-functions.rst
index 325a60b..3c9b501 100644
--- a/docs/hazmat/primitives/key-derivation-functions.rst
+++ b/docs/hazmat/primitives/key-derivation-functions.rst
@@ -131,8 +131,8 @@
 
     It consists of two distinct phases "Extract" and "Expand".  The "Extract"
     stage takes a low-entropy key and extracts from it a fixed size
-    psuedorandom key.  The "Expand" stage derives a large key of a user
-    determined size from the psuedorandom key.
+    pseudorandom key.  The "Expand" stage derives a large key of a user
+    determined size from the pseudorandom key.
 
     :param algorithm: An instance of a
         :class:`~cryptography.hazmat.primitives.interfaces.HashAlgorithm`
diff --git a/docs/spelling_wordlist.txt b/docs/spelling_wordlist.txt
index 75628ba..cf421ea 100644
--- a/docs/spelling_wordlist.txt
+++ b/docs/spelling_wordlist.txt
@@ -17,6 +17,7 @@
 iOS
 pickleable
 plaintext
+pseudorandom
 testability
 unencrypted
 unpadded