diff --git a/src/config/user_config.hpp b/src/config/user_config.hpp
index 14a87ef46..277a49145 100644
--- a/src/config/user_config.hpp
+++ b/src/config/user_config.hpp
@@ -673,7 +673,7 @@ namespace UserConfigParams
     PARAM_PREFIX BoolUserConfigParam        m_force_legacy_device
         PARAM_DEFAULT(BoolUserConfigParam(false, "force_legacy_device",
         &m_video_group, "Force OpenGL 2 context, even if OpenGL 3 is available."));
-    PARAM_PREFIX BoolUserConfigParam        split_screen_horizontally
+    PARAM_PREFIX BoolUserConfigParam        m_split_screen_horizontally
         PARAM_DEFAULT(BoolUserConfigParam(true, "split_screen_horizontally",
             &m_video_group, "When playing a non-square amount of players (e.g. 2),"
             " should it split horizontally (top/bottom)"));
diff --git a/src/graphics/irr_driver.cpp b/src/graphics/irr_driver.cpp
index 0c5365c8d..79de52218 100644
--- a/src/graphics/irr_driver.cpp
+++ b/src/graphics/irr_driver.cpp
@@ -334,7 +334,7 @@ core::recti IrrDriver::getSplitscreenWindow(int window_num)
         total_players = 1;
     int columns = (int)(std::ceil(std::sqrt(total_players)));
     int rows = (int)(std::ceil((double)(total_players) / columns));
-    if (UserConfigParams::split_screen_horizontally)
+    if (UserConfigParams::m_split_screen_horizontally)
         std::swap(columns, rows);
 
     // Calculate the base dimensions of each viewport
diff --git a/src/states_screens/options/options_screen_display.cpp b/src/states_screens/options/options_screen_display.cpp
index cf8a34b23..3225dd6cc 100644
--- a/src/states_screens/options/options_screen_display.cpp
+++ b/src/states_screens/options/options_screen_display.cpp
@@ -128,7 +128,7 @@ void OptionsScreenDisplay::init()
     // ---- splitscreen mode
     GUIEngine::SpinnerWidget* splitscreen_method = getWidget<GUIEngine::SpinnerWidget>("splitscreen_method");
     assert( splitscreen_method != NULL );
-    splitscreen_method->setValue(UserConfigParams::split_screen_horizontally ? 1 : 0);
+    splitscreen_method->setValue(UserConfigParams::m_split_screen_horizontally ? 1 : 0);
 }   // init
 
 // --------------------------------------------------------------------------------------------
@@ -406,7 +406,7 @@ void OptionsScreenDisplay::eventCallback(Widget* widget, const std::string& name
     {
         GUIEngine::SpinnerWidget* splitscreen_method = getWidget<GUIEngine::SpinnerWidget>("splitscreen_method");
         assert( splitscreen_method != NULL );
-        UserConfigParams::split_screen_horizontally = (splitscreen_method->getValue() == 1);
+        UserConfigParams::m_split_screen_horizontally = (splitscreen_method->getValue() == 1);
         if (World::getWorld())
         {
             for (unsigned i = 0; i < Camera::getNumCameras(); i++)