diff --git a/sims/common-sim-flags.mk b/sims/common-sim-flags.mk
index 2b56e989..30044508 100644
--- a/sims/common-sim-flags.mk
+++ b/sims/common-sim-flags.mk
@@ -37,6 +37,10 @@ SIM_LDFLAGS = \
 CLOCK_PERIOD ?= 1.0
 RESET_DELAY ?= 777.7
 
+VORTEX_SIM_PREPROC_DEFINES = \
+	+define+GPR_RESET \
+	+define+DBG_TRACE_CORE_PIPELINE_VCS
+
 SIM_PREPROC_DEFINES = \
 	+define+CLOCK_PERIOD=$(CLOCK_PERIOD) \
 	+define+RESET_DELAY=$(RESET_DELAY) \
@@ -47,4 +51,5 @@ SIM_PREPROC_DEFINES = \
 	+define+RANDOMIZE_REG_INIT \
 	+define+RANDOMIZE_GARBAGE_ASSIGN \
 	+define+RANDOMIZE_INVALID_ASSIGN \
+	$(VORTEX_SIM_PREPROC_DEFINES) \
 	$(EXTRA_SIM_PREPROC_DEFINES)