diff --git a/CREDITS.md b/CREDITS.md
index e69de29..6a8d3bf 100644
--- a/CREDITS.md
+++ b/CREDITS.md
@@ -0,0 +1 @@
+[https://github.com/ivankoma](https://github.com/ivankoma) -  Empty ROM data in config.plist #14 
\ No newline at end of file
diff --git a/generate-unique-machine-values.sh b/generate-unique-machine-values.sh
index 1cdd707..2dc4594 100755
--- a/generate-unique-machine-values.sh
+++ b/generate-unique-machine-values.sh
@@ -335,8 +335,8 @@ EOF
 
                 mkdir -p "${OUTPUT_DIRECTORY}/plists"
                 source "${OUTPUT_ENV_FILE}"
-                ROM_VALUE="${MAC_ADDRESS//\:/}"
-                ROM_VALUE="${ROM_VALUE,,}"
+                ROM="${MAC_ADDRESS//\:/}"
+                ROM="${ROM,,}"
                 sed -e s/\{\{DEVICE_MODEL\}\}/"${DEVICE_MODEL}"/g \
                     -e s/\{\{SERIAL\}\}/"${SERIAL}"/g \
                     -e s/\{\{BOARD_SERIAL\}\}/"${BOARD_SERIAL}"/g \