diff --git a/util/test/demos/d3d12/d3d12_helpers.cpp b/util/test/demos/d3d12/d3d12_helpers.cpp
index 70383eb66..bec78892e 100644
--- a/util/test/demos/d3d12/d3d12_helpers.cpp
+++ b/util/test/demos/d3d12/d3d12_helpers.cpp
@@ -170,7 +170,7 @@ D3D12_ROOT_PARAMETER1 constParam(D3D12_SHADER_VISIBILITY vis, UINT space, UINT r
 }
 
 D3D12_ROOT_PARAMETER1 tableParam(D3D12_SHADER_VISIBILITY vis, D3D12_DESCRIPTOR_RANGE_TYPE type,
-                                 UINT space, UINT basereg, UINT numreg)
+                                 UINT space, UINT basereg, UINT numreg, UINT descOffset)
 {
   // this is a super hack but avoids the need to be clumsy with allocation of these structs
   static D3D12_DESCRIPTOR_RANGE1 ranges[32] = {};
@@ -192,7 +192,7 @@ D3D12_ROOT_PARAMETER1 tableParam(D3D12_SHADER_VISIBILITY vis, D3D12_DESCRIPTOR_R
   range.RegisterSpace = space;
   range.BaseShaderRegister = basereg;
   range.NumDescriptors = numreg;
-  range.OffsetInDescriptorsFromTableStart = 0;
+  range.OffsetInDescriptorsFromTableStart = descOffset;
   range.Flags = D3D12_DESCRIPTOR_RANGE_FLAG_NONE;
 
   return ret;
diff --git a/util/test/demos/d3d12/d3d12_helpers.h b/util/test/demos/d3d12/d3d12_helpers.h
index 779a5e281..6bf65f64a 100644
--- a/util/test/demos/d3d12/d3d12_helpers.h
+++ b/util/test/demos/d3d12/d3d12_helpers.h
@@ -257,7 +257,7 @@ D3D12_ROOT_PARAMETER1 cbvParam(D3D12_SHADER_VISIBILITY vis, UINT space, UINT reg
 D3D12_ROOT_PARAMETER1 constParam(D3D12_SHADER_VISIBILITY vis, UINT space, UINT reg, UINT num);
 
 D3D12_ROOT_PARAMETER1 tableParam(D3D12_SHADER_VISIBILITY vis, D3D12_DESCRIPTOR_RANGE_TYPE type,
-                                 UINT space, UINT basereg, UINT numreg);
+                                 UINT space, UINT basereg, UINT numreg, UINT descOffset = 0);
 
 #define GET_REFCOUNT(val, obj) \
   do                           \