diff --git a/docs/api/cyclone/concurrent.md b/docs/api/cyclone/concurrent.md
index 51632237..c9488f40 100644
--- a/docs/api/cyclone/concurrent.md
+++ b/docs/api/cyclone/concurrent.md
@@ -73,7 +73,7 @@ Note that concurrency primitives must still be used to safely coordinate access
 
 The following types of objects are always shared:
 
-- Concurrency primitives (mutex, conditional variable, atom). These object are allocated directly on the heap since by definition multiple threads need to use them for synchronization.
+- Concurrency primitives (mutex, conditional variable, atom). These objects are allocated directly on the heap since by definition multiple threads need to use them for synchronization.
 
 - Fixnum integers and characters. These are immediates (IE, value types) so there is no object in memory to reference.