diff --git a/Source/Core/VideoBackends/Vulkan/ShaderCompiler.cpp b/Source/Core/VideoBackends/Vulkan/ShaderCompiler.cpp
index a06cab771e..8ec105ceeb 100644
--- a/Source/Core/VideoBackends/Vulkan/ShaderCompiler.cpp
+++ b/Source/Core/VideoBackends/Vulkan/ShaderCompiler.cpp
@@ -50,6 +50,7 @@ static const char SHADER_HEADER[] = R"(
   #define SAMPLER_BINDING(x) layout(set = 1, binding = x)
   #define TEXEL_BUFFER_BINDING(x) layout(set = 1, binding = (x + 8))
   #define SSBO_BINDING(x) layout(set = 2, binding = x)
+  #define INPUT_ATTACHMENT_BINDING(x, y, z) layout(set = x, binding = y, input_attachment_index = z)
   #define VARYING_LOCATION(x) layout(location = x)
   #define FORCE_EARLY_Z layout(early_fragment_tests) in