diff --git a/make/defs.mk b/make/defs.mk
index f4d791b4..9e959758 100644
--- a/make/defs.mk
+++ b/make/defs.mk
@@ -114,6 +114,7 @@ USE_PROJECT_LIB       ?= true
 USE_YTOOLS            ?= true
 USE_EXCEPTIONS_IN_C   ?= true
 REENTRANT             ?= true
+USE_SYSTEMD           ?= true
 
 export REENTRANT
 
@@ -703,6 +704,12 @@ ifneq ($(filter ytools,$(PREREQ_BUILD)),)
 	endif
 endif
 
+ifeq ($(USE_SYSTEMD),true)
+	BUILD_CFLAGS      += -D_USE_SYSTEMD_
+	BUILD_CPPFLAGS    += -D_USE_SYSTEMD_
+	BUILD_LDFLAGS     += -lsystemd-daemon
+endif
+
 ifeq ($(USE_TIMER),true)
 	BUILD_CFLAGS+= -D_USE_TIMER_
 	BUILD_CPPFLAGS    += -D_USE_TIMER_