diff --git a/regression/Makefile b/regression/Makefile
index 48f114df..7a65b8dd 100644
--- a/regression/Makefile
+++ b/regression/Makefile
@@ -255,7 +255,7 @@ stamps/%/vsim-jtag-dtm-64-$(JTAG_DTM_TEST).stamp: stamps/%/vsim$(JTAG_STAMP_SUFF
 
 stamps/%/emulator-jtag-dtm-32-$(JTAG_DTM_TEST).stamp:  stamps/%/emulator$(JTAG_STAMP_SUFFIX).stamp stamps/riscv-tests.stamp
 	RISCV=$(RISCV) $(GDBSERVER) \
-	--sim_cmd "$(abspath $(TOP))/emulator/emulator-$(PROJECT)-$*$(JTAG_DEBUG_SUFFIX) +verbose $(SEED_ARG) $(EMULATOR_JTAG_VCDPLUS_32) dummybin" \
+	--sim_cmd="$(abspath $(TOP))/emulator/emulator-$(PROJECT)-$*$(JTAG_DEBUG_SUFFIX) +verbose $(SEED_ARG) $(EMULATOR_JTAG_VCDPLUS_32) dummybin" \
 	--server_cmd="$(RISCV)/bin/openocd $(OPENOCD_DEBUG) \
 	--s $(RISCV)/share/openocd/scripts" \
 	--32 \
@@ -265,7 +265,7 @@ stamps/%/emulator-jtag-dtm-32-$(JTAG_DTM_TEST).stamp:  stamps/%/emulator$(JTAG_S
 
 stamps/%/emulator-jtag-dtm-64-$(JTAG_DTM_TEST).stamp:  stamps/%/emulator$(JTAG_STAMP_SUFFIX).stamp stamps/riscv-tests.stamp
 	RISCV=$(RISCV) $(GDBSERVER) \
-	--sim_cmd "$(abspath $(TOP))/emulator/emulator-$(PROJECT)-$*$(JTAG_DEBUG_SUFFIX) +verbose $(SEED_ARG) $(EMULATOR_JTAG_VCDPLUS_64) dummybin" \
+	--sim_cmd="$(abspath $(TOP))/emulator/emulator-$(PROJECT)-$*$(JTAG_DEBUG_SUFFIX) +verbose $(SEED_ARG) $(EMULATOR_JTAG_VCDPLUS_64) dummybin" \
 	--server_cmd="$(RISCV)/bin/openocd $(OPENOCD_DEBUG) \
 	--s $(RISCV)/share/openocd/scripts" \
 	--64 \