diff --git a/userspace/engine/lua/modules/compiler.lua b/userspace/engine/lua/modules/compiler.lua
index 7f9ffa28..3e2cf283 100644
--- a/userspace/engine/lua/modules/compiler.lua
+++ b/userspace/engine/lua/modules/compiler.lua
@@ -40,7 +40,7 @@ end
    The AST is changed in-place.
 
    The return value is a boolean which is true if any macro was
-   substitued. This allows a caller to re-traverse until no more macros are
+   substituted. This allows a caller to re-traverse until no more macros are
    found, a simple strategy for recursive resolutions (e.g. when a macro
    definition uses another macro).