diff --git a/mlir/lib/Target/SPIRV/Deserialization/Deserializer.cpp b/mlir/lib/Target/SPIRV/Deserialization/Deserializer.cpp
index 50883d9ed5e75..7724c8d49ece7 100644
--- a/mlir/lib/Target/SPIRV/Deserialization/Deserializer.cpp
+++ b/mlir/lib/Target/SPIRV/Deserialization/Deserializer.cpp
@@ -355,6 +355,7 @@ LogicalResult spirv::Deserializer::processDecoration(ArrayRef<uint32_t> words) {
     break;
   case spirv::Decoration::Location:
   case spirv::Decoration::SpecId:
+  case spirv::Decoration::Index:
     if (words.size() != 3) {
       return emitError(unknownLoc, "OpDecoration with ")
              << decorationName << "needs a single integer literal";
diff --git a/mlir/lib/Target/SPIRV/Serialization/Serializer.cpp b/mlir/lib/Target/SPIRV/Serialization/Serializer.cpp
index c879a2b3e0207..9ac1e5438e70b 100644
--- a/mlir/lib/Target/SPIRV/Serialization/Serializer.cpp
+++ b/mlir/lib/Target/SPIRV/Serialization/Serializer.cpp
@@ -338,6 +338,7 @@ LogicalResult Serializer::processDecorationAttr(Location loc, uint32_t resultID,
   case spirv::Decoration::Binding:
   case spirv::Decoration::DescriptorSet:
   case spirv::Decoration::Location:
+  case spirv::Decoration::Index:
     if (auto intAttr = dyn_cast<IntegerAttr>(attr)) {
       args.push_back(intAttr.getValue().getZExtValue());
       break;
diff --git a/mlir/test/Target/SPIRV/decorations.mlir b/mlir/test/Target/SPIRV/decorations.mlir
index 29b5d4fd5c743..f64d113ebba9d 100644
--- a/mlir/test/Target/SPIRV/decorations.mlir
+++ b/mlir/test/Target/SPIRV/decorations.mlir
@@ -84,6 +84,13 @@ spirv.module Logical GLSL450 requires #spirv.vce<v1.0, [Shader, Linkage], []> {
 
 // -----
 
+spirv.module Logical GLSL450 requires #spirv.vce<v1.0, [Shader, Linkage], []> {
+  // CHECK: index = 42
+  spirv.GlobalVariable @var {index = 42 : i32} : !spirv.ptr<vector<2xf32>, Output>
+}
+
+// -----
+
 spirv.module Logical GLSL450 requires #spirv.vce<v1.0, [Shader, Linkage], []> {
   // CHECK: linkage_attributes = #spirv.linkage_attributes<linkage_name = "outSideGlobalVar1", linkage_type = <Import>>
   spirv.GlobalVariable @var1 {