diff --git a/lib/generate_functions.py b/lib/generate_functions.py
index 73695b3..89ba562 100755
--- a/lib/generate_functions.py
+++ b/lib/generate_functions.py
@@ -404,7 +404,7 @@ def parse_header(header_name: str, output_file: str, ext_file: str, prefix: str,
 
             zig_type = ziggify_type(arg_name, arg_type, func_name)
 
-            if zig_type.startswith("*") and (func_name, arg_name) in single_opt:
+            if (func_name, arg_name) in single_opt:
                 if not arg_type.startswith("[*c]"):
                     arg_type = "?" + arg_type
                 zig_type = "?" + zig_type
diff --git a/lib/rlgl.zig b/lib/rlgl.zig
index 5d325a1..fe62459 100644
--- a/lib/rlgl.zig
+++ b/lib/rlgl.zig
@@ -921,7 +921,7 @@ pub fn rlResizeFramebuffer(width: i32, height: i32) void {
 }
 
 /// Load shader from code strings
-pub fn rlLoadShaderCode(vsCode: [:0]const u8, fsCode: [:0]const u8) u32 {
+pub fn rlLoadShaderCode(vsCode: ?[:0]const u8, fsCode: ?[:0]const u8) u32 {
     return @as(u32, cdef.rlLoadShaderCode(@as([*c]const u8, @ptrCast(vsCode)), @as([*c]const u8, @ptrCast(fsCode))));
 }