diff --git a/src/platform/common.zig b/src/platform/common.zig
new file mode 100644
index 00000000..ba4f27ac
--- /dev/null
+++ b/src/platform/common.zig
@@ -0,0 +1,6 @@
+pub fn checkApplication(comptime App: type) void {
+    // TODO: check signature
+    if (!@hasDecl(App, "init")) @compileError("App must export 'pub fn init(app: *App, engine: *mach.Engine) !void'");
+    if (!@hasDecl(App, "deinit")) @compileError("App must export 'pub fn deinit(app: *App, engine: *mach.Engine) void'");
+    if (!@hasDecl(App, "update")) @compileError("App must export 'pub fn update(app: *App, engine: *mach.Engine) !bool'");
+}
diff --git a/src/platform/native.zig b/src/platform/native.zig
index d058ed59..e9c84a18 100644
--- a/src/platform/native.zig
+++ b/src/platform/native.zig
@@ -390,11 +390,9 @@ pub const GpuDriver = struct {
 
 pub const BackingTimer = std.time.Timer;
 
-// TODO: check signatures
+const common = @import("common.zig");
 comptime {
-    if (!@hasDecl(App, "init")) @compileError("App must export 'pub fn init(app: *App, engine: *mach.Engine) !void'");
-    if (!@hasDecl(App, "deinit")) @compileError("App must export 'pub fn deinit(app: *App, engine: *mach.Engine) void'");
-    if (!@hasDecl(App, "update")) @compileError("App must export 'pub fn update(app: *App, engine: *mach.Engine) !bool'");
+    common.checkApplication(App);
 }
 
 pub fn main() !void {
diff --git a/src/platform/wasm.zig b/src/platform/wasm.zig
index cff0bb87..35db409f 100644
--- a/src/platform/wasm.zig
+++ b/src/platform/wasm.zig
@@ -110,6 +110,11 @@ pub const BackingTimer = struct {
     }
 };
 
+const common = @import("common.zig");
+comptime {
+    common.checkApplication(App);
+}
+
 var app: App = undefined;
 var engine: Engine = undefined;