diff --git a/cert-functions.sh b/cert-functions.sh
index 45dafcc..c4dea7d 100644
--- a/cert-functions.sh
+++ b/cert-functions.sh
@@ -162,7 +162,7 @@ function make_pfx() {
             -inkey "$CERT_DIR/${CERT_NAME}_key.pem" \
             -in "$CERT_DIR/${CERT_NAME}_cert.pem" \
             -certfile "$CERT_DIR/ca_cert.pem" \
-            -passout pass:stdin; then
+            -password pass:stdin; then
             echo "ERROR: Failed to generate PKCS#12 (PFX) file." >&2
             return 1
         fi