diff --git a/src/Platform/WindowlessNaClApplication.cpp b/src/Platform/WindowlessNaClApplication.cpp
index c1e72711f..e0065b82c 100644
--- a/src/Platform/WindowlessNaClApplication.cpp
+++ b/src/Platform/WindowlessNaClApplication.cpp
@@ -26,6 +26,7 @@
 
 #include <ppapi/cpp/graphics_3d.h>
 #include <ppapi/cpp/completion_callback.h>
+#include <Utility/Assert.h>
 #include <Utility/NaClStreamBuffer.h>
 
 #include "Context.h"
@@ -112,4 +113,8 @@ bool WindowlessNaClApplication::Init(uint32_t , const char* , const char*) {
     return exec() == 0;
 }
 
+void WindowlessNaClApplication::Graphics3DContextLost() {
+    CORRADE_ASSERT(false, "NaClApplication: context unexpectedly lost", );
+}
+
 }}
diff --git a/src/Platform/WindowlessNaClApplication.h b/src/Platform/WindowlessNaClApplication.h
index 32aaa8f20..010a6ba41 100644
--- a/src/Platform/WindowlessNaClApplication.h
+++ b/src/Platform/WindowlessNaClApplication.h
@@ -35,7 +35,6 @@
 #include <ppapi/cpp/graphics_3d_client.h>
 #include <ppapi/gles2/gl2ext_ppapi.h>
 
-#include "Math/Vector2.h"
 #include "Magnum.h"
 
 #include "corradeCompatibility.h"
@@ -132,9 +131,7 @@ class WindowlessNaClApplication: public pp::Instance, public pp::Graphics3DClien
     private:
         struct ConsoleDebugOutput;
 
-        void Graphics3DContextLost() override {
-            CORRADE_ASSERT(false, "NaClApplication: context unexpectedly lost", );
-        }
+        void Graphics3DContextLost() override;
 
         bool Init(std::uint32_t, const char*, const char*) override;