diff --git a/build.zig b/build.zig
index de31e1a..5f132bb 100644
--- a/build.zig
+++ b/build.zig
@@ -53,7 +53,7 @@ pub fn addFacilio(exe: *std.build.LibExeObjStep) !void {
     if (b.is_release) try flags.append("-Os");
     try flags.append("-Wno-return-type-c-linkage");
     try flags.append("-fno-sanitize=undefined");
-
+    try flags.append("-DFIO_OVERRIDE_MALLOC");
     exe.addIncludePath("./src/deps/facilio/libdump/all");
 
     // Add C
diff --git a/examples/hello/hello.zig b/examples/hello/hello.zig
index 4fa3bde..0d0629f 100644
--- a/examples/hello/hello.zig
+++ b/examples/hello/hello.zig
@@ -7,15 +7,21 @@ fn on_request(request: [*c]zap.C.http_s) callconv(.C) void {
 }
 
 pub fn main() !void {
+    std.debug.print("debug1\n", .{});
     // configure
-    var listen_settings = zap.ListenSettings.init();
+    var listen_settings: zap.ListenSettings = .{};
+    std.debug.print("debug2\n", .{});
     listen_settings.on_request = on_request;
     listen_settings.log = true;
 
+    std.debug.print("debug3\n", .{});
+
     // listen
     try zap.listen("3000", null, listen_settings);
     std.debug.print("Listening on port 3000\n", .{});
 
+    std.debug.print("debug4\n", .{});
+
     // start working
     zap.start(.{
         .threads = 4,
diff --git a/src/deps/facilio.zig b/src/deps/facilio.zig
index 7829e3e..d08c51b 100644
--- a/src/deps/facilio.zig
+++ b/src/deps/facilio.zig
@@ -1,6 +1,7 @@
 // zig type definitions for facilio lib
 // or maybe let's just make it zap directly...
 
+const std = @import("std");
 pub const C = @cImport({
     @cInclude("http.h");
     @cInclude("fio.h");
@@ -34,8 +35,7 @@ pub fn listen(port: [*c]const u8, interface: [*c]const u8, settings: ListenSetti
         }
         pfolder = pf.ptr;
     }
-
-    if (C.http_listen(port, interface, .{
+    var x: C.http_settings_s = .{
         .on_request = settings.on_request,
         .on_upgrade = settings.on_upgrade,
         .on_response = settings.on_response,
@@ -55,7 +55,11 @@ pub fn listen(port: [*c]const u8, interface: [*c]const u8, settings: ListenSetti
         .ws_timeout = 0,
         .log = if (settings.log) 1 else 0,
         .is_client = 0,
-    }) == -1) {
+    };
+    // TODO: BUG: without this print statement, -Drelease* loop forever
+    // in debug2 and debug3
+    std.debug.print("X\n", .{});
+    if (C.http_listen(port, interface, x) == -1) {
         return error.ListenError;
     }
 }