diff --git a/src/spirv/spirv_module.cpp b/src/spirv/spirv_module.cpp
index 0f63facb..bea4f538 100644
--- a/src/spirv/spirv_module.cpp
+++ b/src/spirv/spirv_module.cpp
@@ -419,6 +419,16 @@ namespace dxvk {
   }
   
   
+  void SpirvModule::decorateIndex(
+          uint32_t                object,
+          uint32_t                index) {
+    m_annotations.putIns  (spv::OpDecorate, 4);
+    m_annotations.putWord (object);
+    m_annotations.putWord (spv::DecorationIndex);
+    m_annotations.putInt32(index);
+  }
+
+
   void SpirvModule::decorateLocation(
           uint32_t                object,
           uint32_t                location) {
diff --git a/src/spirv/spirv_module.h b/src/spirv/spirv_module.h
index 36f0fdd2..22fc76ea 100644
--- a/src/spirv/spirv_module.h
+++ b/src/spirv/spirv_module.h
@@ -189,6 +189,10 @@ namespace dxvk {
             uint32_t                object,
             uint32_t                set);
     
+    void decorateIndex(
+            uint32_t                object,
+            uint32_t                index);
+    
     void decorateLocation(
             uint32_t                object,
             uint32_t                location);