diff --git a/src/renderer_mtl.mm b/src/renderer_mtl.mm
index aee8fe81..0abac192 100644
--- a/src/renderer_mtl.mm
+++ b/src/renderer_mtl.mm
@@ -220,6 +220,7 @@ namespace bgfx { namespace mtl
 		MTLSamplerAddressModeRepeat,
 		MTLSamplerAddressModeMirrorRepeat,
 		MTLSamplerAddressModeClampToEdge,
+		MTLSamplerAddressModeClampToZero,
 	};
 
 	static const MTLSamplerMinMagFilter s_textureFilterMinMag[] =