diff --git a/README.md b/README.md
index f6af2d9..044e46d 100644
--- a/README.md
+++ b/README.md
@@ -114,7 +114,8 @@ module MakeSet(Key: KEY) : SET with type elt = Key.t
 
 module MakeHeterogeneousSet(Key: HETEROGENEOUS_KEY) : HETEROGENEOUS_SET
   with type 'a elt = 'a Key.t
-module MakeHeterogeneousMap(Key: HETEROGENEOUS_KEY)(Value: HETEROGENEOUS_VALUE) : HETEROGENEOUS_MAP
+module MakeHeterogeneousMap(Key: HETEROGENEOUS_KEY)(Value: HETEROGENEOUS_VALUE) :
+  HETEROGENEOUS_MAP
   with type 'a key = 'a Key.t
    and type ('k,'m) value = ('k,'m) Value.t
 ```
@@ -125,8 +126,8 @@ of these four functors: `MakeHashconsedMap`, `MakeHashconsedSet`,
 These uniquely number their nodes, and ensure nodes with the same contents are
 always physically equal. With this unique numbering:
 - `equal` and `compare` become constant time operations;
-- two maps with the same bindings (where keys compared by `KEY.to_int` and
-  values by `HASHED_VALUE.polyeq` will always be physically equal;
+- two maps with the same bindings (where keys are compared by `KEY.to_int` and
+  values by `HASHED_VALUE.polyeq`) will always be physically equal;
 - functions that benefit from sharing will see improved performance;
 - constructors are slightly slower, as they now require a hash-table lookup;
 - memory usage is increased: nodes store their tags inside themselves, and
diff --git a/index.mld b/index.mld
index 85f29c2..5f5e990 100644
--- a/index.mld
+++ b/index.mld
@@ -104,7 +104,8 @@ The functors used to build maps and sets are the following:
 {li For Heterogeneous (generic) maps and sets: {{!PatriciaTree.MakeHeterogeneousMap}[MakeHeterogeneousMap]}
     and {{!PatriciaTree.MakeHeterogeneousSet}[MakeHeterogeneousSet]}.
     {[
-      module MakeHeterogeneousMap(Key: HETEROGENEOUS_KEY)(Value: HETEROGENEOUS_VALUE) : HETEROGENEOUS_MAP
+      module MakeHeterogeneousMap(Key: HETEROGENEOUS_KEY)(Value: HETEROGENEOUS_VALUE) :
+        HETEROGENEOUS_MAP
         with type 'a key = 'a Key.t
          and type ('k,'m) value = ('k,'m) Value.t
       module MakeHeterogeneousSet(Key: HETEROGENEOUS_KEY) : HETEROGENEOUS_SET
@@ -117,7 +118,7 @@ The functors used to build maps and sets are the following:
   These uniquely number their nodes, and ensures {b nodes with the same contents are
   always physically equal}. With this unique numbering:
   - [equal] and [compare] become constant time operations;
-  - two maps with the same bindings (where keys compared by {{!PatriciaTree.KEY.to_int}[KEY.to_int]} and
+  - two maps with the same bindings (where keys are compared by {{!PatriciaTree.KEY.to_int}[KEY.to_int]} and
     values by {{!PatriciaTree.HASHED_VALUE.polyeq}[HASHED_VALUE.polyeq]}) will always be physically equal;
   - functions that benefit from sharing will see improved performance;
   - constructors are slightly slower, as they now require a hash-table lookup;