diff --git a/lib/Differentiator/DerivativeBuilder.cpp b/lib/Differentiator/DerivativeBuilder.cpp
index cda7d886d..77a1377c4 100644
--- a/lib/Differentiator/DerivativeBuilder.cpp
+++ b/lib/Differentiator/DerivativeBuilder.cpp
@@ -92,7 +92,7 @@ namespace clad {
   }
 
   DeclWithContext DerivativeBuilder::cloneFunction(
-      const clang::FunctionDecl* FD, clad::VisitorBase& VB,
+      const clang::FunctionDecl* FD, clad::VisitorBase& VD,
       clang::DeclContext* DC, clang::Sema& m_Sema, clang::ASTContext& m_Context,
       clang::SourceLocation& noLoc, clang::DeclarationNameInfo name,
       clang::QualType functionType) {
@@ -114,7 +114,7 @@ namespace clad {
       returnedFD->setAccess(FD->getAccess());
     } else {
       assert (isa<FunctionDecl>(FD) && "Unexpected!");
-      enclosingNS = VB.RebuildEnclosingNamespaces(DC);
+      enclosingNS = VD.RebuildEnclosingNamespaces(DC);
       returnedFD = FunctionDecl::Create(m_Context, 
                                         m_Sema.CurContext, 
                                         noLoc,