diff --git a/makefile b/makefile
index 7082311..b6c1ddb 100644
--- a/makefile
+++ b/makefile
@@ -121,6 +121,12 @@
   DEFINES += USER_BUILD_VARIANT=1
 endif
 
+ifeq ($(USE_LE_SYSTEMD),true)
+  DEFINES += USE_LE_SYSTEMD=1
+else
+  DEFINES += USE_LE_SYSTEMD=0
+endif
+
 # these need to be filled out by the project/target/platform rules.mk files
 TARGET :=
 PLATFORM :=