diff --git a/smack-core/src/main/java/org/jivesoftware/smack/AbstractXMPPConnection.java b/smack-core/src/main/java/org/jivesoftware/smack/AbstractXMPPConnection.java
index 4965a2724..843f811b7 100644
--- a/smack-core/src/main/java/org/jivesoftware/smack/AbstractXMPPConnection.java
+++ b/smack-core/src/main/java/org/jivesoftware/smack/AbstractXMPPConnection.java
@@ -1064,7 +1064,7 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
                         streamFeature = RosterVer.INSTANCE;
                     }
                     else {
-                        LOGGER.severe("Unkown Roster Versioning Namespace: "
+                        LOGGER.severe("Unknown Roster Versioning Namespace: "
                                         + namespace
                                         + ". Roster versioning not enabled");
                     }
diff --git a/smack-core/src/main/java/org/jivesoftware/smack/provider/ProviderFileLoader.java b/smack-core/src/main/java/org/jivesoftware/smack/provider/ProviderFileLoader.java
index 442020bb6..c589bfedd 100644
--- a/smack-core/src/main/java/org/jivesoftware/smack/provider/ProviderFileLoader.java
+++ b/smack-core/src/main/java/org/jivesoftware/smack/provider/ProviderFileLoader.java
@@ -118,7 +118,7 @@ public class ProviderFileLoader implements ProviderLoader {
                                                     (PacketExtensionProvider<PacketExtension>) provider.newInstance()));
                                     break;
                                 default:
-                                    LOGGER.warning("Unkown provider type: " + typeName);
+                                    LOGGER.warning("Unknown provider type: " + typeName);
                                 }
                             }
                             catch (ClassNotFoundException cnfe) {
diff --git a/smack-tcp/src/main/java/org/jivesoftware/smack/tcp/XMPPTCPConnection.java b/smack-tcp/src/main/java/org/jivesoftware/smack/tcp/XMPPTCPConnection.java
index 5b13c122d..adc574e76 100644
--- a/smack-tcp/src/main/java/org/jivesoftware/smack/tcp/XMPPTCPConnection.java
+++ b/smack-tcp/src/main/java/org/jivesoftware/smack/tcp/XMPPTCPConnection.java
@@ -1151,7 +1151,7 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
                             }
                             break;
                          default:
-                             LOGGER.warning("Unkown top level stream element: " + name);
+                             LOGGER.warning("Unknown top level stream element: " + name);
                              break;
                         }
                         break;