diff --git a/core/project_settings.cpp b/core/project_settings.cpp
index 5a3ee7835ba..0d09d03f767 100644
--- a/core/project_settings.cpp
+++ b/core/project_settings.cpp
@@ -894,6 +894,21 @@ Error ProjectSettings::save_custom(const String &p_path, const CustomMap &p_cust
 	}
 }
 
+Variant _GLOBAL_DEF_ALIAS(const String &p_var, const String &p_old_name, const Variant &p_default, bool p_restart_if_changed) {
+	// if the new name setting isn't present, try the old one
+	if (!ProjectSettings::get_singleton()->has_setting(p_var)) {
+
+		if (ProjectSettings::get_singleton()->has_setting(p_old_name)) {
+
+			// if the old setting is present, get the value and set it in the new setting
+			Variant value = ProjectSettings::get_singleton()->get(p_old_name);
+			ProjectSettings::get_singleton()->set(p_var, value);
+		}
+	}
+
+	return _GLOBAL_DEF(p_var, p_default, p_restart_if_changed);
+}
+
 Variant _GLOBAL_DEF(const String &p_var, const Variant &p_default, bool p_restart_if_changed) {
 
 	Variant ret;
diff --git a/core/project_settings.h b/core/project_settings.h
index 8fe12fde56e..3e8d7849e6b 100644
--- a/core/project_settings.h
+++ b/core/project_settings.h
@@ -163,8 +163,11 @@ public:
 
 //not a macro any longer
 Variant _GLOBAL_DEF(const String &p_var, const Variant &p_default, bool p_restart_if_changed = false);
+Variant _GLOBAL_DEF_ALIAS(const String &p_var, const String &p_old_name, const Variant &p_default, bool p_restart_if_changed = false);
 #define GLOBAL_DEF(m_var, m_value) _GLOBAL_DEF(m_var, m_value)
 #define GLOBAL_DEF_RST(m_var, m_value) _GLOBAL_DEF(m_var, m_value, true)
+#define GLOBAL_DEF_ALIAS(m_var, m_old_name, m_value) _GLOBAL_DEF_ALIAS(m_var, m_old_name, m_value)
+#define GLOBAL_DEF_ALIAS_RST(m_var, m_old_name, m_value) _GLOBAL_DEF(m_var, m_old_name, m_value, true)
 #define GLOBAL_GET(m_var) ProjectSettings::get_singleton()->get(m_var)
 
 #endif
diff --git a/main/main.cpp b/main/main.cpp
index 9453fe4eb10..c763c02c28b 100644
--- a/main/main.cpp
+++ b/main/main.cpp
@@ -1126,7 +1126,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 		OS::get_singleton()->_allow_layered = false;
 	}
 
-	Engine::get_singleton()->_gpu_pixel_snap = GLOBAL_DEF("rendering/2d/snapping/use_gpu_pixel_snap", false);
+	Engine::get_singleton()->_gpu_pixel_snap = GLOBAL_DEF_ALIAS("rendering/2d/snapping/use_gpu_pixel_snap", "rendering/quality/2d/use_pixel_snap", false);
 
 	OS::get_singleton()->_keep_screen_on = GLOBAL_DEF("display/window/energy_saving/keep_screen_on", true);
 	if (rtm == -1) {