diff --git a/clang/lib/Sema/Sema.cpp b/clang/lib/Sema/Sema.cpp
index faf375fb8fab3..6220e3f9e6d69 100644
--- a/clang/lib/Sema/Sema.cpp
+++ b/clang/lib/Sema/Sema.cpp
@@ -483,7 +483,7 @@ Sema::~Sema() {
 
   // Delete cached satisfactions.
   std::vector<ConstraintSatisfaction *> Satisfactions;
-  Satisfactions.reserve(Satisfactions.size());
+  Satisfactions.reserve(SatisfactionCache.size());
   for (auto &Node : SatisfactionCache)
     Satisfactions.push_back(&Node);
   for (auto *Node : Satisfactions)