diff --git a/handler/src/main/java/io/netty/handler/ssl/util/FingerprintTrustManagerFactory.java b/handler/src/main/java/io/netty/handler/ssl/util/FingerprintTrustManagerFactory.java
index a209db79f3..cda1419a97 100644
--- a/handler/src/main/java/io/netty/handler/ssl/util/FingerprintTrustManagerFactory.java
+++ b/handler/src/main/java/io/netty/handler/ssl/util/FingerprintTrustManagerFactory.java
@@ -40,7 +40,7 @@ import java.util.regex.Pattern;
  * An {@link TrustManagerFactory} that trusts an X.509 certificate whose SHA1 checksum matches.
  * <p>
  * <strong>NOTE:</strong>
- * Never use this {@link TrustManagerFactory} in production unless you are not sure what you are exactly doing with it.
+ * Never use this {@link TrustManagerFactory} in production unless you are sure exactly what you are doing with it.
  * </p><p>
  * The SHA1 checksum of an X.509 certificate is calculated from its DER encoded format.  You can get the fingerprint of
  * an X.509 certificate using the {@code openssl} command.  For example: