diff --git a/scripts/regression/regression.mk b/scripts/regression/regression.mk
index 1c29bdf..1ebb27f 100644
--- a/scripts/regression/regression.mk
+++ b/scripts/regression/regression.mk
@@ -23,7 +23,7 @@ regression_random_machine_os:
 	cd ../..
 	export VEXRISCV_REGRESSION_CONFIG_COUNT=30
 	export VEXRISCV_REGRESSION_CONFIG_LINUX_RATE=0.0
-	export VEXRISCV_REGRESSION_CONFIG_MACHINE_OS_RATE = 1.0
+	export VEXRISCV_REGRESSION_CONFIG_MACHINE_OS_RATE=1.0
 	export VEXRISCV_REGRESSION_FREERTOS_COUNT=2
 	export VEXRISCV_REGRESSION_ZEPHYR_COUNT=4
 	export VEXRISCV_REGRESSION_THREAD_COUNT=1
@@ -33,7 +33,7 @@ regression_random_baremetal:
 	cd ../..
 	export VEXRISCV_REGRESSION_CONFIG_COUNT=40
 	export VEXRISCV_REGRESSION_CONFIG_LINUX_RATE=0.0
-	export VEXRISCV_REGRESSION_CONFIG_MACHINE_OS_RATE = 0.0
+	export VEXRISCV_REGRESSION_CONFIG_MACHINE_OS_RATE=0.0
 	export VEXRISCV_REGRESSION_FREERTOS_COUNT=1
 	export VEXRISCV_REGRESSION_ZEPHYR_COUNT=no
 	export VEXRISCV_REGRESSION_THREAD_COUNT=1