diff --git a/clang/lib/CodeGen/Mangle.cpp b/clang/lib/CodeGen/Mangle.cpp
index a45403e..0aa9f40 100644
--- a/clang/lib/CodeGen/Mangle.cpp
+++ b/clang/lib/CodeGen/Mangle.cpp
@@ -2043,7 +2043,11 @@
     Out << "LDnE";
     break;
   }
-
+      
+  case Expr::PackExpansionExprClass:
+    Out << "sp";
+    mangleExpression(cast<PackExpansionExpr>(E)->getPattern());
+    break;
   }
 }