diff --git a/man/signal-cli.1.adoc b/man/signal-cli.1.adoc
index 58d373ed..235e128f 100644
--- a/man/signal-cli.1.adoc
+++ b/man/signal-cli.1.adoc
@@ -126,7 +126,7 @@ Use listDevices to see the deviceIds.
 
 === isRegistered
 
-Checks if a list of users are registered on Signal or not.
+Checks if a list of phone numbers are registered on Signal or not.
 
 [NUMBER [NUMBER ...]]::
 One or more numbers to check.
diff --git a/src/main/java/org/asamk/signal/manager/Manager.java b/src/main/java/org/asamk/signal/manager/Manager.java
index 06582f08..27eee77f 100644
--- a/src/main/java/org/asamk/signal/manager/Manager.java
+++ b/src/main/java/org/asamk/signal/manager/Manager.java
@@ -353,12 +353,7 @@ public class Manager implements Closeable {
      * @throws IOException if its unable to check if the user is registered
      */
     public boolean isUserRegistered(String number) throws IOException {
-        ContactTokenDetails details = this.accountManager.getContact(number).orNull();
-        if (details == null) {
-            return false;
-        }
-
-        return true;
+        return this.accountManager.getContact(number).orNull() != null;
     }
 
     public void register(boolean voiceVerification, String captcha) throws IOException {