diff --git a/gtsam/nonlinear/GncOptimizer.h b/gtsam/nonlinear/GncOptimizer.h
index 21d4e826b..45c674401 100644
--- a/gtsam/nonlinear/GncOptimizer.h
+++ b/gtsam/nonlinear/GncOptimizer.h
@@ -26,9 +26,9 @@
 
 #pragma once
 
-#include <gtsam/nonlinear/GncHelpers.h>
 #include <gtsam/nonlinear/GncParams.h>
 #include <gtsam/nonlinear/NonlinearFactorGraph.h>
+#include <gtsam/nonlinear/internal/chiSquaredInverse.h>
 
 namespace gtsam {
 /*
diff --git a/gtsam/nonlinear/internal/chiSquaredInverse.h b/gtsam/nonlinear/internal/chiSquaredInverse.h
index 7a27a3530..3729bf754 100644
--- a/gtsam/nonlinear/internal/chiSquaredInverse.h
+++ b/gtsam/nonlinear/internal/chiSquaredInverse.h
@@ -10,7 +10,7 @@
  * -------------------------------------------------------------------------- */
 
 /**
- * @file    GncHelpers.h
+ * @file    chiSquaredInverse.h
  * @brief   Helper functions for use with the GncOptimizer
  * @author  Varun Agrawal
  */
diff --git a/gtsam/nonlinear/tests/testChiSquaredInverse.cpp b/gtsam/nonlinear/tests/testChiSquaredInverse.cpp
index 6e47f97cc..65c3b417d 100644
--- a/gtsam/nonlinear/tests/testChiSquaredInverse.cpp
+++ b/gtsam/nonlinear/tests/testChiSquaredInverse.cpp
@@ -10,7 +10,7 @@
  * -------------------------------------------------------------------------- */
 
 /*
- * @file testGncHelpers.cpp
+ * @file testChiSquaredInverse.cpp
  * @date July 10, 2023
  * @author Varun Agrawal
  * @brief Tests for Chi-squared distribution.
@@ -18,12 +18,12 @@
 
 #include <CppUnitLite/TestHarness.h>
 #include <gtsam/base/Testable.h>
-#include <gtsam/nonlinear/GncHelpers.h>
+#include <gtsam/nonlinear/internal/chiSquaredInverse.h>
 
 using namespace gtsam;
 
 /* ************************************************************************* */
-TEST(GncHelpers, ChiSqInv) {
+TEST(ChiSquaredInverse, ChiSqInv) {
   double barcSq = chi_squared_quantile(2, 0.99);
   EXPECT_DOUBLES_EQUAL(9.21034, barcSq, 1e-5);
 }