diff --git a/src/d3d11/d3d11_context.cpp b/src/d3d11/d3d11_context.cpp
index 6f881ed7..52f5debe 100644
--- a/src/d3d11/d3d11_context.cpp
+++ b/src/d3d11/d3d11_context.cpp
@@ -2781,6 +2781,9 @@ namespace dxvk {
           UINT                              NumViewports,
     const D3D11_VIEWPORT*                   pViewports) {
     D3D10DeviceLock lock = LockContext();
+
+    if (NumViewports > m_state.rs.viewports.size())
+      return;
     
     bool dirty = m_state.rs.numViewports != NumViewports;
     m_state.rs.numViewports = NumViewports;