diff --git a/glfw/src/internal_debug.zig b/glfw/src/internal_debug.zig
new file mode 100644
index 00000000..74a085e6
--- /dev/null
+++ b/glfw/src/internal_debug.zig
@@ -0,0 +1,11 @@
+const std = @import("std");
+const zig_builtin = @import("builtin");
+
+const debug_mode = (zig_builtin.mode == .Debug);
+var glfw_initialized = if (debug_mode) false else @as(void, {});
+pub inline fn toggleInitialized() void {
+    if (debug_mode) glfw_initialized = !glfw_initialized;
+}
+pub inline fn assertInitialized() void {
+    if (debug_mode) std.debug.assert(glfw_initialized);
+}