diff --git a/src/memory.md b/src/memory.md
index d32310d3..4072d4f3 100644
--- a/src/memory.md
+++ b/src/memory.md
@@ -41,7 +41,7 @@ In addition to types, there are a number of other arena-allocated data structure
 allocate, and which are found in this module. Here are a few examples:
 
 - [`GenericArgs`], allocated with `mk_args` – this will intern a slice of types, often used
-to specify the values to be substituted for generics args(e.g. `HashMap<i32, u32>` would be
+to specify the values to be substituted for generics args (e.g. `HashMap<i32, u32>` would be
 represented as a slice `&'tcx [tcx.types.i32, tcx.types.u32]`).
 - [`TraitRef`], typically passed by value – a **trait reference** consists of a reference to a trait
   along with its various type parameters (including `Self`), like `i32: Display` (here, the def-id