diff --git a/lib/Sema/SemaTemplateInstantiateDecl.cpp b/lib/Sema/SemaTemplateInstantiateDecl.cpp
index 1f58568..8ff80af 100644
--- a/lib/Sema/SemaTemplateInstantiateDecl.cpp
+++ b/lib/Sema/SemaTemplateInstantiateDecl.cpp
@@ -646,6 +646,7 @@
           = dyn_cast<FunctionTemplateDecl>((Decl *)ActiveInst.Entity)) {
       assert(FunTmpl->getTemplatedDecl() == Tmpl && 
              "Deduction from the wrong function template?");
+      (void) FunTmpl;
       ActiveInst.Kind = ActiveInstType::TemplateInstantiation;
       ActiveInst.Entity = reinterpret_cast<uintptr_t>(New);
     }