diff --git a/README.mdown b/README.mdown
index 3cd1c9a..8e38b2e 100644
--- a/README.mdown
+++ b/README.mdown
@@ -344,7 +344,7 @@ Otherwise, a successful agar slant colony is used to create [liquid culture](#li
 
 Once the mycelium is successfully isolated in [liquid cultures](#liquid-cultures), the mycelium wants something a bit more nutritious than sugar water.
 Most species have special requirements that encourage the growth of mushrooms.
-Wood-loving species like oyster and shiitake thrive in a mixture of saw dust.
+Wood-loving species like oyster and shiitake thrive in a mixture of sawdust.
 This guide does not address these special requirements.
 I leave it up to you to research your mycelium species.