diff --git a/src/zmpl/debug.zig b/src/zmpl/debug.zig
index 3d517e4..ce28185 100644
--- a/src/zmpl/debug.zig
+++ b/src/zmpl/debug.zig
@@ -80,7 +80,7 @@ fn debugSourceLocation(
     try source_file.interface.readSliceAll(content);
 
     var cursor: usize = 0;
-    var buf: [std.heap.pageSize()]u8 = undefined;
+    var buf: [std.heap.page_size_min]u8 = undefined;
     try source_file.seekTo(0);
     const source_line_number = outer: {
         while (cursor < from_position) {
@@ -122,7 +122,7 @@ fn findDebugLine(
 
     var cursor: usize = 0;
     var line: usize = 0;
-    var buf: [std.heap.pageSize()]u8 = undefined;
+    var buf: [std.heap.page_size_min]u8 = undefined;
     var position: usize = 0;
 
     var read_buffer: [256]u8 = undefined;