diff --git a/copy-firmware.sh b/copy-firmware.sh
index c78c5bd1..e64b5677 100755
--- a/copy-firmware.sh
+++ b/copy-firmware.sh
@@ -22,7 +22,7 @@ warn() {
 
 has_gnu_parallel() {
     if command -v parallel > /dev/null; then
-        if parallel --version | grep -Fq 'GNU Parallel'; then
+        if parallel --version | grep -Fqi 'gnu parallel'; then
            return 0
         fi
     fi