diff --git a/arch/sim/src/Makefile b/arch/sim/src/Makefile
index 0360cae613..dbcb0c40a3 100644
--- a/arch/sim/src/Makefile
+++ b/arch/sim/src/Makefile
@@ -98,9 +98,6 @@ ifeq ($(CONFIG_SMP),y)
   CSRCS += up_smpsignal.c up_cpuidlestack.c
   REQUIREDOBJS += up_smpsignal$(OBJEXT)
   HOSTCFLAGS += -DCONFIG_SMP=1 -DCONFIG_SMP_NCPUS=$(CONFIG_SMP_NCPUS)
-ifeq ($(CONFIG_SCHED_INSTRUMENTATION),y)
-  HOSTCFLAGS += -DCONFIG_SCHED_INSTRUMENTATION=1
-endif
   HOSTSRCS += up_simsmp.c
 endif