diff --git a/doc/hook/fexhook.md b/doc/hook/fexhook.md
index 95139e1..e5a6ba9 100644
--- a/doc/hook/fexhook.md
+++ b/doc/hook/fexhook.md
@@ -21,7 +21,7 @@ You need two main folders:
 ## Data folder
 Contents of the folder:
 * game: The binaries of the custom "Fiesta FS". These are stored in raw areas
-of the HDD and have to be extraced. File names must be lower case.
+of the HDD and have to be extraced. File names must be upper case.
 * lib: Put any libraries (especially older versions of libraries that can't be
 installed anymore using the package manager) the game uses and aren't installed
 on your system in here.
diff --git a/doc/hook/fsthook.md b/doc/hook/fsthook.md
index 9f355a7..78c57ee 100644
--- a/doc/hook/fsthook.md
+++ b/doc/hook/fsthook.md
@@ -21,7 +21,7 @@ You need two main folders:
 ## Data folder
 Contents of the folder:
 * game: The binaries of the custom "Fiesta FS". These are stored in raw areas
-of the HDD and have to be extraced. File names must be lower case.
+of the HDD and have to be extraced. File names must be upper case.
 * lib: Put any libraries (especially older versions of libraries that can't be
 installed anymore using the package manager) the game uses and aren't installed
 on your system in here.