diff --git a/.circleci/config.yml b/.circleci/config.yml
index 77fd3843..54439331 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -103,7 +103,7 @@ jobs:
       - run:
           name: Use RPC URLs
           command: |
-            if [ -z $L1_RPC_MAINNET ] || [ -z $L1_RPC_MAINNET ]; then
+            if [ -z "$L1_RPC_MAINNET" ] || [ -z "$L1_RPC_MAINNET" ]; then
                 echo "Required RPC URLs are not available."
             fi
               L1_RPC_URL=$L1_RPC_MAINNET