diff --git a/src/fprime/fbuild/builder.py b/src/fprime/fbuild/builder.py
index 732e98fa..7ca93987 100644
--- a/src/fprime/fbuild/builder.py
+++ b/src/fprime/fbuild/builder.py
@@ -301,7 +301,6 @@ def get_cmake_args(self) -> dict:
             ("FPRIME_PROJECT_ROOT", "project_root"),
             ("FPRIME_SETTINGS_FILE", "settings_file"),
             ("FPRIME_ENVIRONMENT_FILE", "environment_file"),
-            ("FPRIME_AC_CONSTANTS_FILE", "ac_constants"),
             ("FPRIME_CONFIG_DIR", "config_directory"),
             ("FPRIME_INSTALL_DEST", "install_destination"),
         ]
diff --git a/src/fprime/fbuild/settings.py b/src/fprime/fbuild/settings.py
index 5c23d526..5de25d96 100644
--- a/src/fprime/fbuild/settings.py
+++ b/src/fprime/fbuild/settings.py
@@ -64,11 +64,6 @@ class IniSettings:
             SettingType.PATH,
             partial(join, "framework_path", "config"),
         ),
-        (
-            "ac_constants",
-            SettingType.PATH,
-            partial(join, "config_directory", "AcConstants.ini"),
-        ),
         (
             "install_destination",
             SettingType.PATH,
diff --git a/test/fprime/fbuild/test_settings.py b/test/fprime/fbuild/test_settings.py
index be3aee81..8de2bef0 100644
--- a/test/fprime/fbuild/test_settings.py
+++ b/test/fprime/fbuild/test_settings.py
@@ -35,7 +35,6 @@ def test_settings():
                 "environment": {},
                 "component_cookiecutter": "default",
                 "deployment_cookiecutter": "default",
-                "ac_constants": full_path("..") / "config" / "AcConstants.ini",
                 "project_root": full_path(".."),
                 "config_directory": full_path("..") / "config",
                 "default_cmake_options": "",
@@ -56,7 +55,6 @@ def test_settings():
                 "environment": {},
                 "component_cookiecutter": "default",
                 "deployment_cookiecutter": "default",
-                "ac_constants": full_path("..") / "config" / "AcConstants.ini",
                 "project_root": full_path(".."),
                 "config_directory": full_path("..") / "config",
                 "default_cmake_options": "",
@@ -79,7 +77,6 @@ def test_settings():
                 "environment": {},
                 "component_cookiecutter": "default",
                 "deployment_cookiecutter": "default",
-                "ac_constants": full_path("..") / "config" / "AcConstants.ini",
                 "project_root": full_path(".."),
                 "config_directory": full_path("..") / "config",
                 "default_cmake_options": "",
@@ -102,7 +99,6 @@ def test_settings():
                 "environment": {},
                 "component_cookiecutter": "gh:SterlingPeet/cookiecutter-fprime-deployment",
                 "deployment_cookiecutter": "https://github.com/thomas-bc/fprime-deployment-cookiecutter.git",
-                "ac_constants": full_path("..") / "config" / "AcConstants.ini",
                 "project_root": full_path(".."),
                 "config_directory": full_path("..") / "config",
                 "default_cmake_options": "",
@@ -125,7 +121,6 @@ def test_settings():
                 "environment": {},
                 "component_cookiecutter": "default",
                 "deployment_cookiecutter": "default",
-                "ac_constants": full_path("..") / "config" / "AcConstants.ini",
                 "project_root": full_path(".."),
                 "config_directory": full_path("..") / "config",
                 "default_cmake_options": "OPTION1=ABC\nOPTION2=123\nOPTION3=Something",