diff --git a/Makefile.am b/Makefile.am
index a46ffd0..23f39bb 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -54,9 +54,11 @@
 	sensors/builderconfig.cpp \
 	sensors/manager.cpp \
 	pid/ec/pid.cpp \
-	pid/controller.cpp \
+	pid/ec/stepwise.cpp \
 	pid/fancontroller.cpp \
 	pid/thermalcontroller.cpp \
+	pid/pidcontroller.cpp \
+	pid/stepwisecontroller.cpp \
 	pid/builder.cpp \
 	pid/builderconfig.cpp \
 	pid/zone.cpp \