diff --git a/bin/wsim b/bin/wsim
index acb5cec76..3c7bdc554 100755
--- a/bin/wsim
+++ b/bin/wsim
@@ -81,6 +81,7 @@ def prepSim(args, ElfFile):
     paramsList = []
     argsList = []
     flagsList = []
+    defineList = []
     if args.vcd:
         paramsList.append("MAKE_VCD=1")
     if args.rvvi:
@@ -95,15 +96,19 @@ def prepSim(args, ElfFile):
         flagsList.append("--ccov")
     if args.fcov:
         flagsList.append("--fcov")
+        defineList.append("+define+INCLUDE_TRACE2COV", "+define+IDV_INCLUDE_TRACE2COV", "+define+COVER_BASE_RV32I") # COVER_BASE_RV32I is just needed to keep riscvISACOV happy, but does not affect tests
+        argsList.append("+TRACE2COV_ENABLE=1", "+IDV_TRACE2COV=1")
     if args.gui:
         flagsList.append("--gui")
     if args.lockstep or args.lockstepverbose:
         flagsList.append("--lockstep")
     if args.lockstep or args.lockstepverbose or args.fcov:
         prefix = lockstepSetup(args)
+        defineList.append("+define+USE_IMPERAS_DV")
     # Combine into a single string
     args.args += " ".join(argsList)
     args.params += " ".join(paramsList)
+    args.define += " ".join(defineList)
     flags = " ".join(flagsList)
     return flags, prefix
 
@@ -140,7 +145,7 @@ def runQuesta(args, flags, prefix):
     if args.define != "":
         args.define = fr'--define \"{args.define}\"'
     # Questa cannot accept more than 9 arguments.  fcov implies lockstep
-    cmd = f"do wally.do {args.config} {args.testsuite} {args.tb} {args.args} {args.params} {flags}"
+    cmd = f"do wally.do {args.config} {args.testsuite} {args.tb} {args.args} {args.params} {args.define} {flags}"
     cmd = f'cd $WALLY/sim/questa; {prefix} vsim {"-c" if not args.gui else ""} -do "{cmd}"'
     print(f"Running Questa with command: {cmd}")
     os.system(cmd)
@@ -157,13 +162,13 @@ def runVCS(args, flags, prefix):
         args.params = f'--params "{args.params}"'
     if args.define != "":
         args.define = f'--define "{args.define}"'
-    cmd = f"cd $WALLY/sim/vcs; {prefix} ./run_vcs {args.config} {args.testsuite} --tb {args.tb} {args.args} {args.params} {flags}"
+    cmd = f"cd $WALLY/sim/vcs; {prefix} ./run_vcs {args.config} {args.testsuite} --tb {args.tb} {args.args} {args.params} {args.define} {flags}"
     print(cmd)
     os.system(cmd)
 
 def main(args):
     validateArgs(args)
-    print(f"Config={args.config} tests={args.testsuite} sim={args.sim} gui={args.gui} args='{args.args}' params='{args.params}'")
+    print(f"Config={args.config} tests={args.testsuite} sim={args.sim} gui={args.gui} args='{args.args}' params='{args.params}' define='{args.define}'")
     ElfFile = elfFileCheck(args)
     flags, prefix = prepSim(args, ElfFile)
     createDirs(args.sim)
diff --git a/sim/questa/wally.do b/sim/questa/wally.do
index 639539e02..34cafeb77 100644
--- a/sim/questa/wally.do
+++ b/sim/questa/wally.do
@@ -62,7 +62,6 @@ set CoverageVsimArg ""
 
 set FunctCoverage 0
 set FCvlog ""
-set FCvopt ""
 
 set lockstep 0
 set lockstepvlog ""
@@ -105,20 +104,14 @@ if {[lcheck lst "--ccov"]} {
 # if --fcov found set flag and remove from list
 if {[lcheck lst "--fcov"]} {
     set FunctCoverage 1
-    # COVER_BASE_RV32I is just needed to keep riscvISACOV happy, but no longer affects tests
-    set FCvlog "+define+INCLUDE_TRACE2COV \
-                +define+IDV_INCLUDE_TRACE2COV \
-                +define+COVER_BASE_RV32I \
-                +incdir+$env(WALLY)/addins/cvw-arch-verif/riscvISACOV/source"
-    set FCvopt "+TRACE2COV_ENABLE=1 +IDV_TRACE2COV=1"
+    set FCvlog "+incdir+$env(WALLY)/addins/cvw-arch-verif/riscvISACOV/source"
 }
 
 # if --lockstep or --fcov found set flag and remove from list
 if {[lcheck lst "--lockstep"] || $FunctCoverage == 1} {
     set IMPERAS_HOME $::env(IMPERAS_HOME)
     set lockstep 1
-    set lockstepvlog "+define+USE_IMPERAS_DV \
-                      +incdir+${IMPERAS_HOME}/ImpPublic/include/host \
+    set lockstepvlog "+incdir+${IMPERAS_HOME}/ImpPublic/include/host \
                       +incdir+${IMPERAS_HOME}/ImpProprietary/include/host \
                       ${IMPERAS_HOME}/ImpPublic/source/host/rvvi/*.sv \
                       ${IMPERAS_HOME}/ImpProprietary/source/host/idv/*.sv"
@@ -174,7 +167,7 @@ vlog -permissive -lint -work ${WKDIR} {*}${INC_DIRS} {*}{$DefineArgs} {*}${FCvlo
 # remove +acc flag for faster sim during regressions if there is no need to access internal signals
 vopt $accFlag wkdir/${CFG}_${TESTSUITE}.${TESTBENCH} -work ${WKDIR} {*}${ExpandedParamArgs} -o testbenchopt ${CoverageVoptArg}
 
-vsim -lib ${WKDIR} testbenchopt +TEST=${TESTSUITE} {*}${PlusArgs} -fatal 7 {*}${SVLib} {*}${FCvopt} -suppress 3829 ${CoverageVsimArg}
+vsim -lib ${WKDIR} testbenchopt +TEST=${TESTSUITE} {*}${PlusArgs} -fatal 7 {*}${SVLib} -suppress 3829 ${CoverageVsimArg}
 
 # power add generates the logging necessary for saif generation.
 # power add -r /dut/core/*
diff --git a/sim/vcs/run_vcs b/sim/vcs/run_vcs
index 7e2c7aca8..e062205ae 100755
--- a/sim/vcs/run_vcs
+++ b/sim/vcs/run_vcs
@@ -59,7 +59,7 @@ INCLUDE_PATH="+incdir+" + cfgdir + "/" + args.config + " +incdir+" + cfgdir + "/
 
 # lockstep mode
 if (args.lockstep):
-    LOCKSTEP_OPTIONS = " +define+USE_IMPERAS_DV +incdir+$IMPERAS_HOME/ImpPublic/include/host  +incdir+$IMPERAS_HOME/ImpProprietary/include/host  $IMPERAS_HOME/ImpPublic/source/host/rvvi/*.sv $IMPERAS_HOME/ImpProprietary/source/host/idv/*.sv " + tbdir + "/common/wallyTracer.sv"
+    LOCKSTEP_OPTIONS = " +incdir+$IMPERAS_HOME/ImpPublic/include/host  +incdir+$IMPERAS_HOME/ImpProprietary/include/host  $IMPERAS_HOME/ImpPublic/source/host/rvvi/*.sv $IMPERAS_HOME/ImpProprietary/source/host/idv/*.sv " + tbdir + "/common/wallyTracer.sv"
     LOCKSTEP_SIMV = "-sv_lib $IMPERAS_HOME/lib/Linux64/ImperasLib/imperas.com/verification/riscv/1.0/model"
 else:
     LOCKSTEP_OPTIONS = ""