diff --git a/src/d3d11/d3d11_context_imm.cpp b/src/d3d11/d3d11_context_imm.cpp
index 6898e81a..4250ecc7 100644
--- a/src/d3d11/d3d11_context_imm.cpp
+++ b/src/d3d11/d3d11_context_imm.cpp
@@ -547,6 +547,8 @@ namespace dxvk {
   
   
   void D3D11ImmediateContext::SynchronizeCsThread() {
+    D3D10DeviceLock lock = LockContext();
+
     // Dispatch current chunk so that all commands
     // recorded prior to this function will be run
     FlushCsChunk();