diff --git a/lib/SILOptimizer/Mandatory/Differentiation.cpp b/lib/SILOptimizer/Mandatory/Differentiation.cpp
index 64d2d312211ce..4cfeb78bdf3c5 100644
--- a/lib/SILOptimizer/Mandatory/Differentiation.cpp
+++ b/lib/SILOptimizer/Mandatory/Differentiation.cpp
@@ -1305,6 +1305,16 @@ void DifferentiableActivityInfo::analyze(DominanceInfo *di,
           if (isVaried(cai->getSrc(), i))
             recursivelySetVariedIfDifferentiable(cai->getDest(), i);
         }
+        else if (auto *sei = dyn_cast<StructExtractInst>(&inst)) {
+          if (isVaried(sei->getOperand(), i)) {
+            auto hasNoDeriv = sei->getField()->getAttrs()
+                .hasAttribute<NoDerivativeAttr>();
+            if (!hasNoDeriv) {
+              for (auto result: inst.getResults())
+                setVariedIfDifferentiable(result, i);
+            }
+          }
+        }
         // Handle everything else.
         else {
           for (auto &op : inst.getAllOperands())