diff --git a/README.markdown b/README.markdown
index 5d28b74..3175ead 100644
--- a/README.markdown
+++ b/README.markdown
@@ -1,7 +1,7 @@
 OpenSCAD MCAD Library
 =====================
 
-This library contains components commonly used in designing and moching up
+This library contains components commonly used in designing and mocking up
 mechanical designs. It is currently unfinished and you can expect some API
 changes, however many things are already working.