diff --git a/docs/Writing-the-Cyclone-Scheme-Compiler-Revised-2017.md b/docs/Writing-the-Cyclone-Scheme-Compiler-Revised-2017.md
index 91692b52..1b5d9016 100644
--- a/docs/Writing-the-Cyclone-Scheme-Compiler-Revised-2017.md
+++ b/docs/Writing-the-Cyclone-Scheme-Compiler-Revised-2017.md
@@ -355,7 +355,7 @@ Binary Bit Pattern | Data Type
 01 | Integer
 10 | Character
 
-Booleans are potentially another good candidate for values types. But for the time being they are represented in the runtime using pointers to the constants `boolean_t` and `boolean_f`.
+Booleans are potentially another good candidate for value types. But for the time being they are represented in the runtime using pointers to the constants `boolean_t` and `boolean_f`.
 
 ### Thread Data Parameter