diff --git a/README.md b/README.md
index fb0dc7b..3cc34e0 100644
--- a/README.md
+++ b/README.md
@@ -85,9 +85,9 @@ int main()
     const auto path = "file.txt";
 
     // NOTE: mio does *not* create the file for you if it doesn't exist! You
-    // must ensure that the file exist before establishing a mapping. It must
-    // also be at least 43 bytes long for the below indexing to work. So for
-    // illustrative purposes the file is created now.
+    // must ensure that the file exists before establishing a mapping. It
+    // must also be non-empty. So for illustrative purposes the file is
+    // created now.
     allocate_file(path, 155);
 
     // Read-write memory map the whole file by using `map_entire_file` where the
diff --git a/test/example.cpp b/test/example.cpp
index 403a5bd..efeb67a 100644
--- a/test/example.cpp
+++ b/test/example.cpp
@@ -24,9 +24,9 @@ int main()
     const auto path = "file.txt";
 
     // NOTE: mio does *not* create the file for you if it doesn't exist! You
-    // must ensure that the file exist before establishing a mapping. It must
-    // also be at least 43 bytes long for the below indexing to work. So for
-    // illustrative purposes the file is created now.
+    // must ensure that the file exists before establishing a mapping. It
+    // must also be non-empty. So for illustrative purposes the file is
+    // created now.
     allocate_file(path, 155);
 
     // Read-write memory map the whole file by using `map_entire_file` where the