diff --git a/simple-ca.sh b/simple-ca.sh
index 4ee7e0f..62a5832 100755
--- a/simple-ca.sh
+++ b/simple-ca.sh
@@ -85,11 +85,16 @@ function make_ca() {
     local CA_NAME="$2"
     shift 2
 
-    if [[ -z "$CA_DIR" || -z "$CA_NAME" || ! -d "$CA_DIR" ]]; then
+    if [[ -z "$CA_DIR" || ! -d "$CA_DIR" ]]; then
         echo "ERROR: Certificate directory $CA_DIR does not exist."
         return 1
     fi
 
+    if [[ -z "$CA_NAME" ]]; then
+        echo "ERROR: CA name is required." >&2
+        return 1
+    fi
+
     if [[ -z "$AIA_BASE_URL" && -f "$CA_DIR/aia_base_url.txt" ]]; then
         AIA_BASE_URL="$(cat "$CA_DIR/aia_base_url.txt")"
     fi