diff --git a/FlippR-Driver/src/output/detail/OutputDriver.cpp b/FlippR-Driver/src/output/detail/OutputDriver.cpp
index 2ba8af3..ba7240d 100644
--- a/FlippR-Driver/src/output/detail/OutputDriver.cpp
+++ b/FlippR-Driver/src/output/detail/OutputDriver.cpp
@@ -131,7 +131,7 @@ boost::optional<std::shared_ptr<items::Lamp>> OutputDriver::get_lamp(const std::
 {
   auto lamp = this->lamps.find(name);
   if(lamp == this->lamps.end()) {
-      return boost:optional<std::shared_ptr<items::Lamp>>();
+      return boost::optional<std::shared_ptr<items::Lamp>>();
   }
   return lamp->second;
 }
@@ -140,7 +140,7 @@ boost::optional<std::shared_ptr<items::Solenoid>> OutputDriver::get_solenoid(con
 {
     auto solenoid = this->solenoids.find(name);
     if(solenoid == this->solenoids.end()) {
-        return boost:optional<std::shared_ptr<items::Solenoid>>();
+        return boost::optional<std::shared_ptr<items::Solenoid>>();
     }
   return solenoid->second;
 }
@@ -149,7 +149,7 @@ boost::optional<std::shared_ptr<items::Sound>> OutputDriver::get_sound(const std
 {
     auto sound = this->sounds.find(name);
     if(sound == this->sounds.end()) {
-        return boost:optional<std::shared_ptr<items::Sound>>();
+        return boost::optional<std::shared_ptr<items::Sound>>();
     }
   return sound->second;
 }
@@ -158,7 +158,7 @@ boost::optional<std::shared_ptr<items::Flipper>> OutputDriver::get_flipper(const
 {
     auto flipper = this->flippers.find(name);
     if(flipper == this->flippers.end()) {
-        return boost:optional<std::shared_ptr<items::Flipper>>();
+        return boost::optional<std::shared_ptr<items::Flipper>>();
     }
   return flipper->second;
 }
@@ -167,7 +167,7 @@ boost::optional<std::shared_ptr<items::Display>> OutputDriver::get_display(const
 {
     auto display = this->displays.find(name);
     if(display == this->displays.end()) {
-        return boost:optional<std::shared_ptr<items::Display>>();
+        return boost::optional<std::shared_ptr<items::Display>>();
     }
   return display->second;
 }