diff --git a/src/main.zig b/src/main.zig
index c3b3c9a5..93746f78 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -53,8 +53,7 @@ pub fn main() !void {
     defer vm.deinit();
 
     // document
-    var f = "test.html".*;
-    doc = parser.documentHTMLParse(&f);
+    doc = parser.documentHTMLParse("test.html");
     // TODO: defer doc?
 
     // remove socket file of internal server
diff --git a/src/main_shell.zig b/src/main_shell.zig
index 6d8b2819..aae3d3a5 100644
--- a/src/main_shell.zig
+++ b/src/main_shell.zig
@@ -32,8 +32,7 @@ pub fn main() !void {
     const apis = jsruntime.compile(DOM.Interfaces);
 
     // document
-    var f = "test.html".*;
-    doc = parser.documentHTMLParse(&f);
+    doc = parser.documentHTMLParse("test.html");
     // TODO: defer doc?
 
     // create JS vm
diff --git a/src/netsurf.zig b/src/netsurf.zig
index 7ee98dfc..10f79a36 100644
--- a/src/netsurf.zig
+++ b/src/netsurf.zig
@@ -553,8 +553,9 @@ fn documentHTMLVtable(doc_html: *DocumentHTML) c.dom_html_document_vtable {
     return getVtable(c.dom_html_document_vtable, DocumentHTML, doc_html);
 }
 
-pub fn documentHTMLParse(filename: []u8) *DocumentHTML {
-    const doc = c.wr_create_doc_dom_from_file(filename.ptr);
+pub fn documentHTMLParse(filename: []const u8) *DocumentHTML {
+    var f: []u8 = @constCast(filename);
+    const doc = c.wr_create_doc_dom_from_file(f.ptr);
     if (doc == null) {
         @panic("error parser");
     }
diff --git a/src/run_tests.zig b/src/run_tests.zig
index 821c5689..a1899792 100644
--- a/src/run_tests.zig
+++ b/src/run_tests.zig
@@ -38,8 +38,7 @@ test {
     const apis = jsruntime.compile(DOM.Interfaces);
 
     // document
-    var f = "test.html".*;
-    doc = parser.documentHTMLParse(&f);
+    doc = parser.documentHTMLParse("test.html");
 
     // create JS vm
     const vm = jsruntime.VM.init();