diff --git a/dist/index.js b/dist/index.js
index 80ea456..6e8d198 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -262,8 +262,12 @@ function loginECR(registry, username, password) {
         else {
             core.info(`AWS ECR detected with ${region} region`);
         }
-        process.env.AWS_ACCESS_KEY_ID = username || process.env.AWS_ACCESS_KEY_ID;
-        process.env.AWS_SECRET_ACCESS_KEY = password || process.env.AWS_SECRET_ACCESS_KEY;
+        if (username) {
+            process.env.AWS_ACCESS_KEY_ID = username;
+        }
+        if (password) {
+            process.env.AWS_SECRET_ACCESS_KEY = password;
+        }
         core.info(`Retrieving docker login command through AWS CLI ${cliVersion} (${cliPath})...`);
         const loginCmds = yield aws.getDockerLoginCmds(cliVersion, registry, region, accountIDs);
         core.info(`Logging into ${registry}...`);