diff --git a/lib/Differentiator/BaseForwardModeVisitor.cpp b/lib/Differentiator/BaseForwardModeVisitor.cpp
index 075656c35..f93daee7d 100644
--- a/lib/Differentiator/BaseForwardModeVisitor.cpp
+++ b/lib/Differentiator/BaseForwardModeVisitor.cpp
@@ -163,6 +163,8 @@ BaseForwardModeVisitor::Derive(const FunctionDecl* FD,
   // Check if the function is already declared as a custom derivative.
   std::string gradientName =
       request.BaseFunctionName + "_d" + s + "arg" + argInfo + derivativeSuffix;
+  // FIXME: We should not use const_cast to get the decl context here.
+  // NOLINTNEXTLINE(cppcoreguidelines-pro-type-const-cast)
   auto* DC = const_cast<DeclContext*>(m_DiffReq->getDeclContext());
   if (FunctionDecl* customDerivative =
           m_Builder.LookupCustomDerivativeDecl(gradientName, DC, FD->getType()))
diff --git a/lib/Differentiator/HessianModeVisitor.cpp b/lib/Differentiator/HessianModeVisitor.cpp
index 6d4b2982f..3bcdfa51b 100644
--- a/lib/Differentiator/HessianModeVisitor.cpp
+++ b/lib/Differentiator/HessianModeVisitor.cpp
@@ -127,6 +127,8 @@ static FunctionDecl* DeriveUsingForwardAndReverseMode(
         originalFnProtoType->getExtProtoInfo());
 
     // Check if the function is already declared as a custom derivative.
+    // FIXME: We should not use const_cast to get the decl context here.
+    // NOLINTNEXTLINE(cppcoreguidelines-pro-type-const-cast)
     auto* DC = const_cast<DeclContext*>(m_DiffReq->getDeclContext());
     if (FunctionDecl* customDerivative = m_Builder.LookupCustomDerivativeDecl(
             hessianFuncName, DC, hessianFunctionType))
diff --git a/lib/Differentiator/ReverseModeVisitor.cpp b/lib/Differentiator/ReverseModeVisitor.cpp
index 22dac863b..10483f51a 100644
--- a/lib/Differentiator/ReverseModeVisitor.cpp
+++ b/lib/Differentiator/ReverseModeVisitor.cpp
@@ -362,6 +362,8 @@ Expr* getArraySizeExpr(const ArrayType* AT, ASTContext& context,
         originalFnType->getExtProtoInfo());
 
     // Check if the function is already declared as a custom derivative.
+    // FIXME: We should not use const_cast to get the decl context here.
+    // NOLINTNEXTLINE(cppcoreguidelines-pro-type-const-cast)
     auto* DC = const_cast<DeclContext*>(m_DiffReq->getDeclContext());
     if (FunctionDecl* customDerivative = m_Builder.LookupCustomDerivativeDecl(
             gradientName, DC, gradientFunctionType)) {