diff --git a/Makefile.am b/Makefile.am
index b770fc5..4368593 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -221,8 +221,8 @@ builtin_sources += thermometer/main.c \
 			thermometer/thermometer.h thermometer/thermometer.c \
 			alert/main.c alert/server.h alert/server.c \
 			time/main.c time/server.h time/server.c \
-            plugins/gatt-example.c \
-            proximity/main.c proximity/manager.h proximity/manager.c \
+			plugins/gatt-example.c \
+			proximity/main.c proximity/manager.h proximity/manager.c \
 			proximity/monitor.h proximity/monitor.c \
 			proximity/reporter.h proximity/reporter.c \
 			proximity/linkloss.h proximity/linkloss.c \