diff --git a/phosphor-regulators/src/meson.build b/phosphor-regulators/src/meson.build
index d9ba765..581343f 100644
--- a/phosphor-regulators/src/meson.build
+++ b/phosphor-regulators/src/meson.build
@@ -17,6 +17,7 @@
     'ffdc_file.cpp',
     'id_map.cpp',
     'journal.cpp',
+    'phase_fault_detection.cpp',
     'pmbus_utils.cpp',
     'presence_detection.cpp',
     'presence_service.cpp',