diff --git a/gerrit-httpd/src/main/java/com/google/gerrit/httpd/WebSessionManager.java b/gerrit-httpd/src/main/java/com/google/gerrit/httpd/WebSessionManager.java
index ffa1371fc1..65910418a8 100644
--- a/gerrit-httpd/src/main/java/com/google/gerrit/httpd/WebSessionManager.java
+++ b/gerrit-httpd/src/main/java/com/google/gerrit/httpd/WebSessionManager.java
@@ -24,7 +24,6 @@ import static com.google.gerrit.server.ioutil.BasicSerialization.writeString;
 import static com.google.gerrit.server.ioutil.BasicSerialization.writeVarInt32;
 import static java.util.concurrent.TimeUnit.HOURS;
 import static java.util.concurrent.TimeUnit.MILLISECONDS;
-import static java.util.concurrent.TimeUnit.MINUTES;
 
 import com.google.common.cache.Cache;
 import com.google.gerrit.reviewdb.client.Account;
@@ -66,9 +65,9 @@ class WebSessionManager {
     prng = new SecureRandom();
     self = cache;
 
-    sessionMaxAgeMillis = MINUTES.toMillis(ConfigUtil.getTimeUnit(cfg,
+    sessionMaxAgeMillis = ConfigUtil.getTimeUnit(cfg,
         "cache", CACHE_NAME, "maxAge",
-        MAX_AGE_MINUTES, MINUTES));
+        MAX_AGE_MINUTES, MILLISECONDS);
     if (sessionMaxAgeMillis < TimeUnit.MINUTES.toMillis(5)) {
       log.warn(String.format(
           "cache.%s.maxAge is set to %d milliseconds;" +