diff --git a/include/clad/Differentiator/Compatibility.h b/include/clad/Differentiator/Compatibility.h
index efd3d629c..f2265c995 100644
--- a/include/clad/Differentiator/Compatibility.h
+++ b/include/clad/Differentiator/Compatibility.h
@@ -730,5 +730,11 @@ template <typename X, typename Y> bool isa_and_nonnull(const Y* Val) {
 }
 #endif
 
+#if CLANG_VERSION_MAJOR < 13
+const auto VK_R = ExprValueKind::VK_RValue;
+#else
+const auto VK_R = ExprValueKind::VK_PRValue;
+#endif
+
 } // namespace clad_compat
 #endif //CLAD_COMPATIBILITY
diff --git a/lib/Differentiator/ConstantFolder.cpp b/lib/Differentiator/ConstantFolder.cpp
index b585485a2..daea278fe 100644
--- a/lib/Differentiator/ConstantFolder.cpp
+++ b/lib/Differentiator/ConstantFolder.cpp
@@ -7,6 +7,7 @@
 //----------------------------------------------------------------------------//
 
 #include "ConstantFolder.h"
+#include "clad/Differentiator/Compatibility.h"
 
 #include "clang/AST/ASTContext.h"
 
@@ -148,7 +149,7 @@ namespace clad {
           dyn_cast<EnumType>(QT)->getDecl()->getIntegerType(), C, APVal);
       Expr* cast = ImplicitCastExpr::Create(
           C, QT, clang::CastKind::CK_IntegralCast, Result, nullptr,
-          clang::ExprValueKind::VK_PRValue, FPOptionsOverride());
+          clad_compat::VK_R, FPOptionsOverride());
       Result = cast;
     } else if (QT->isPointerType()) {
       Result = clad::synthesizeLiteral(QT, C);