diff --git a/renderdoc/driver/d3d11/d3d11_analyse.cpp b/renderdoc/driver/d3d11/d3d11_analyse.cpp
index dc994a711..3aa99da41 100644
--- a/renderdoc/driver/d3d11/d3d11_analyse.cpp
+++ b/renderdoc/driver/d3d11/d3d11_analyse.cpp
@@ -739,7 +739,7 @@ void D3D11DebugManager::CreateShaderGlobalState(ShaderDebug::GlobalState &global
 
             rowPitch = mapped.RowPitch;
             depthPitch = 0;
-            size_t datasize = rowPitch * desc.Height;
+            size_t datasize = rowPitch * RDCMAX(1U, desc.Height >> udesc.Texture2D.MipSlice);
 
             uint32_t numSlices = 1;