diff --git a/examples/mccarthy.mlw b/examples/mccarthy.mlw
index 4346347e5d59d0f2f31c9e2c8a13b932e6a8ed6e..941af08c6ebbb94455233b97d724f4fb02f71319 100644
--- a/examples/mccarthy.mlw
+++ b/examples/mccarthy.mlw
@@ -1,5 +1,5 @@
 
-(** {1 McCarthy's ``91'' function}
+(** {1 McCarthy's "91" function}
 
 authors: Jean-Christophe Filliâtre, Martin Clochard, Claude Marché
 witness: Andrei Paskevich
diff --git a/examples/sumrange.mlw b/examples/sumrange.mlw
index 3e89f74099f58901978f29ad4adf57052c7c9435..3cc7b22cece125b4744e6fdc335f83796a9ad499 100644
--- a/examples/sumrange.mlw
+++ b/examples/sumrange.mlw
@@ -348,7 +348,7 @@ module CumulativeTree
 
   So far, we are only able to prove that `update` is logarithmic
 
-  We express the complexity by passing a ``credit'' as a ghost
+  We express the complexity by passing a "credit" as a ghost
   parameter. We pose the precondition that the credit is at least
   equal to the depth of the tree.
 
diff --git a/stdlib/ref.mlw b/stdlib/ref.mlw
index 6284a0626aef1b607b68f029d0a8b6d20fa463c4..64e0c562f43906a33298df9208c7be8b194be3d8 100644
--- a/stdlib/ref.mlw
+++ b/stdlib/ref.mlw
@@ -1,7 +1,7 @@
 
 (** {1 References}
 
-   A mutable variable, or ``reference'' in ML terminology, is simply a
+   A mutable variable, or "reference" in ML terminology, is simply a
    record with a single mutable field [contents].
 *)