diff --git a/ext/native/thin3d/thin3d.h b/ext/native/thin3d/thin3d.h
index b64b33e886..97320ae52e 100644
--- a/ext/native/thin3d/thin3d.h
+++ b/ext/native/thin3d/thin3d.h
@@ -664,7 +664,7 @@ public:
 	}
 
 	virtual std::string GetInfoString(InfoField info) const = 0;
-	virtual uintptr_t GetNativeObject(NativeObject obj) = 0;
+	virtual uint64_t GetNativeObject(NativeObject obj) = 0;
 
 	virtual void HandleEvent(Event ev, int width, int height, void *param1 = nullptr, void *param2 = nullptr) = 0;
 
diff --git a/ext/native/thin3d/thin3d_d3d11.cpp b/ext/native/thin3d/thin3d_d3d11.cpp
index 31a3ad7b88..7d2c2d538b 100644
--- a/ext/native/thin3d/thin3d_d3d11.cpp
+++ b/ext/native/thin3d/thin3d_d3d11.cpp
@@ -131,26 +131,26 @@ public:
 		}
 	}
 
-	uintptr_t GetNativeObject(NativeObject obj) override {
+	uint64_t GetNativeObject(NativeObject obj) override {
 		switch (obj) {
 		case NativeObject::DEVICE:
-			return (uintptr_t)device_;
+			return (uint64_t)(uintptr_t)device_;
 		case NativeObject::CONTEXT:
-			return (uintptr_t)context_;
+			return (uint64_t)(uintptr_t)context_;
 		case NativeObject::DEVICE_EX:
-			return (uintptr_t)device1_;
+			return (uint64_t)(uintptr_t)device1_;
 		case NativeObject::CONTEXT_EX:
-			return (uintptr_t)context1_;
+			return (uint64_t)(uintptr_t)context1_;
 		case NativeObject::BACKBUFFER_COLOR_TEX:
-			return (uintptr_t)bbRenderTargetTex_;
+			return (uint64_t)(uintptr_t)bbRenderTargetTex_;
 		case NativeObject::BACKBUFFER_DEPTH_TEX:
-			return (uintptr_t)bbDepthStencilTex_;
+			return (uint64_t)(uintptr_t)bbDepthStencilTex_;
 		case NativeObject::BACKBUFFER_COLOR_VIEW:
-			return (uintptr_t)bbRenderTargetView_;
+			return (uint64_t)(uintptr_t)bbRenderTargetView_;
 		case NativeObject::BACKBUFFER_DEPTH_VIEW:
-			return (uintptr_t)bbDepthStencilView_;
+			return (uint64_t)(uintptr_t)bbDepthStencilView_;
 		case NativeObject::FEATURE_LEVEL:
-			return (uintptr_t)featureLevel_;
+			return (uint64_t)(uintptr_t)featureLevel_;
 		default:
 			return 0;
 		}
diff --git a/ext/native/thin3d/thin3d_d3d9.cpp b/ext/native/thin3d/thin3d_d3d9.cpp
index b4d446ed9d..672ebd36ab 100644
--- a/ext/native/thin3d/thin3d_d3d9.cpp
+++ b/ext/native/thin3d/thin3d_d3d9.cpp
@@ -572,14 +572,14 @@ public:
 	void DrawUP(const void *vdata, int vertexCount) override;
 	void Clear(int mask, uint32_t colorval, float depthVal, int stencilVal);
 
-	uintptr_t GetNativeObject(NativeObject obj) override {
+	uint64_t GetNativeObject(NativeObject obj) override {
 		switch (obj) {
 		case NativeObject::CONTEXT:
-			return (uintptr_t)d3d_;
+			return (uint64_t)(uintptr_t)d3d_;
 		case NativeObject::DEVICE:
-			return (uintptr_t)device_;
+			return (uint64_t)(uintptr_t)device_;
 		case NativeObject::DEVICE_EX:
-			return (uintptr_t)deviceEx_;
+			return (uint64_t)(uintptr_t)deviceEx_;
 		default:
 			return 0;
 		}
diff --git a/ext/native/thin3d/thin3d_gl.cpp b/ext/native/thin3d/thin3d_gl.cpp
index 8eadd95644..d319c07101 100644
--- a/ext/native/thin3d/thin3d_gl.cpp
+++ b/ext/native/thin3d/thin3d_gl.cpp
@@ -467,10 +467,10 @@ public:
 		}
 	}
 
-	uintptr_t GetNativeObject(NativeObject obj) override {
+	uint64_t GetNativeObject(NativeObject obj) override {
 		switch (obj) {
 		case NativeObject::RENDER_MANAGER:
-			return (uintptr_t)&renderManager_;
+			return (uint64_t)(uintptr_t)&renderManager_;
 		default:
 			return 0;
 		}
diff --git a/ext/native/thin3d/thin3d_vulkan.cpp b/ext/native/thin3d/thin3d_vulkan.cpp
index bbe1e36e24..794fa2c8c2 100644
--- a/ext/native/thin3d/thin3d_vulkan.cpp
+++ b/ext/native/thin3d/thin3d_vulkan.cpp
@@ -455,25 +455,25 @@ public:
 	std::vector<std::string> GetFeatureList() const override;
 	std::vector<std::string> GetExtensionList() const override;
 
-	uintptr_t GetNativeObject(NativeObject obj) override {
+	uint64_t GetNativeObject(NativeObject obj) override {
 		switch (obj) {
 		case NativeObject::FRAMEBUFFER_RENDERPASS:
 			// Return a representative renderpass.
-			return (uintptr_t)renderManager_.GetFramebufferRenderPass();
+			return (uint64_t)renderManager_.GetFramebufferRenderPass();
 		case NativeObject::BACKBUFFER_RENDERPASS:
-			return (uintptr_t)renderManager_.GetBackbufferRenderPass();
+			return (uint64_t)renderManager_.GetBackbufferRenderPass();
 		case NativeObject::COMPATIBLE_RENDERPASS:
-			return (uintptr_t)renderManager_.GetCompatibleRenderPass();
+			return (uint64_t)renderManager_.GetCompatibleRenderPass();
 		case NativeObject::INIT_COMMANDBUFFER:
-			return (uintptr_t)renderManager_.GetInitCmd();
+			return (uint64_t)renderManager_.GetInitCmd();
 		case NativeObject::BOUND_TEXTURE0_IMAGEVIEW:
-			return (uintptr_t)boundImageView_[0];
+			return (uint64_t)boundImageView_[0];
 		case NativeObject::BOUND_TEXTURE1_IMAGEVIEW:
-			return (uintptr_t)boundImageView_[1];
+			return (uint64_t)boundImageView_[1];
 		case NativeObject::RENDER_MANAGER:
-			return (uintptr_t)&renderManager_;
+			return (uint64_t)(uintptr_t)&renderManager_;
 		case NativeObject::NULL_IMAGEVIEW:
-			return (uintptr_t)GetNullTexture()->GetImageView();
+			return (uint64_t)GetNullTexture()->GetImageView();
 		default:
 			Crash();
 			return 0;