diff --git a/lib/preludes/raylib-prelude.zig b/lib/preludes/raylib-prelude.zig
index eb59c9e..71ff73e 100755
--- a/lib/preludes/raylib-prelude.zig
+++ b/lib/preludes/raylib-prelude.zig
@@ -1282,7 +1282,7 @@ pub const Font = extern struct {
     }
 
     /// Load font from file with extended parameters, use NULL for codepoints and 0 for codepointCount to load the default character set
-    pub fn initEx(fileName: [*:0]const u8, fontSize: i32, fontChars: []i32) Font {
+    pub fn initEx(fileName: [*:0]const u8, fontSize: i32, fontChars: ?[]i32) Font {
         return rl.loadFontEx(fileName, fontSize, fontChars);
     }
 
diff --git a/lib/raylib.zig b/lib/raylib.zig
index 18f5e2b..ab0eea2 100644
--- a/lib/raylib.zig
+++ b/lib/raylib.zig
@@ -1282,7 +1282,7 @@ pub const Font = extern struct {
     }
 
     /// Load font from file with extended parameters, use NULL for codepoints and 0 for codepointCount to load the default character set
-    pub fn initEx(fileName: [*:0]const u8, fontSize: i32, fontChars: []i32) Font {
+    pub fn initEx(fileName: [*:0]const u8, fontSize: i32, fontChars: ?[]i32) Font {
         return rl.loadFontEx(fileName, fontSize, fontChars);
     }