diff --git a/src/AnalyzeView/ULogParser.cc b/src/AnalyzeView/ULogParser.cc
index 8399c65..17c08fa 100644
--- a/src/AnalyzeView/ULogParser.cc
+++ b/src/AnalyzeView/ULogParser.cc
@@ -36,7 +36,7 @@ int ULogParser::sizeOfType(QString& typeName)
         return 1;
     }
 
-    qWarning() << "Unkown type in ULog : " << typeName;
+    qWarning() << "Unknown type in ULog : " << typeName;
     return 0;
 }
 
diff --git a/src/Joystick/JoystickSDL.cc b/src/Joystick/JoystickSDL.cc
index 9e96eeb..d61238b 100644
--- a/src/Joystick/JoystickSDL.cc
+++ b/src/Joystick/JoystickSDL.cc
@@ -65,7 +65,7 @@ QMap<QString, Joystick*> JoystickSDL::discover(MultiVehicleManager* _multiVehicl
 
             qCDebug(JoystickLog) << "\t" << name << "axes:" << axisCount << "buttons:" << buttonCount << "hats:" << hatCount << "isGC:" << isGameController;
 
-            // Check for joysticks with duplicate names and differentiate the keys when neccessary.
+            // Check for joysticks with duplicate names and differentiate the keys when necessary.
             // This is required when using an Xbox 360 wireless receiver that always identifies as
             // 4 individual joysticks, regardless of how many joysticks are actually connected to the
             // receiver. Using GUID does not help, all of these devices present the same GUID.
diff --git a/src/MissionManager/MissionItemTest.cc b/src/MissionManager/MissionItemTest.cc
index fd4ab52..1480af7 100644
--- a/src/MissionManager/MissionItemTest.cc
+++ b/src/MissionManager/MissionItemTest.cc
@@ -297,7 +297,7 @@ void MissionItemTest::_testLoadFromJsonV1(void)
     QString     errorString;
     QJsonObject jsonObject = _createV1Json();
 
-    // V1 format has param 1-4 in seperate items instead of in params array
+    // V1 format has param 1-4 in separate items instead of in params array
 
     QStringList removeKeys;
     removeKeys << MissionItem::_jsonParam1Key << MissionItem::_jsonParam2Key << MissionItem::_jsonParam3Key << MissionItem::_jsonParam4Key;