diff --git a/control/Makefile.am b/control/Makefile.am
index aca9c5c..d78ec47 100644
--- a/control/Makefile.am
+++ b/control/Makefile.am
@@ -70,7 +70,8 @@
 	json/actions/net_target_increase.cpp \
 	json/actions/net_target_decrease.cpp \
 	json/actions/timer_based_actions.cpp \
-	json/actions/mapped_floor.cpp
+	json/actions/mapped_floor.cpp \
+	json/utils/modifier.cpp
 else
 phosphor_fan_control_SOURCES += \
 	argument.cpp \