diff --git a/src/api/constraints.rs b/src/api/constraints.rs
index 896ec1e..b8e032a 100644
--- a/src/api/constraints.rs
+++ b/src/api/constraints.rs
@@ -2,13 +2,6 @@ use crate::*;
 
 use std::os::raw::*;
 
-#[no_mangle]
-extern "C" fn constraints_default_master_area_factor(
-    default_master_area_factor: c_float,
-) -> c_float {
-    constraints::default_master_area_factor(default_master_area_factor)
-}
-
 #[no_mangle]
 extern "C" fn constraints_gap_size(gap_size: c_int) -> c_int {
     constraints::gap_size(gap_size)
diff --git a/src/api/settings.rs b/src/api/settings.rs
index 47daa73..46a2d0e 100644
--- a/src/api/settings.rs
+++ b/src/api/settings.rs
@@ -40,3 +40,13 @@ unsafe extern "C" fn settings_get_default_clients_in_master() -> c_int {
 unsafe extern "C" fn settings_set_default_clients_in_master(value: c_int) {
     SETTINGS.unwrap().default_clients_in_master_set(value);
 }
+
+#[no_mangle]
+unsafe extern "C" fn settings_get_default_master_area_factor() -> c_float {
+    SETTINGS.unwrap().default_master_area_factor()
+}
+
+#[no_mangle]
+unsafe extern "C" fn settings_set_default_master_area_factor(value: c_float) {
+    SETTINGS.unwrap().default_master_area_factor_set(value);
+}
diff --git a/src/constraints.h b/src/constraints.h
index eb9ed90..16c4039 100644
--- a/src/constraints.h
+++ b/src/constraints.h
@@ -1,7 +1,6 @@
 #ifndef _CONSTRAINTS_H
 #define _CONSTRAINTS_H
 
-float constraints_default_master_area_factor(float default_master_area_factor);
 int constraints_gap_size(int gap_size);
 float constraints_master_area_factor(float master_area_factor);
 int constraints_max_clients_in_master(int max_clients_in_master);
diff --git a/src/settings.c b/src/settings.c
index 36b7231..8903509 100644
--- a/src/settings.c
+++ b/src/settings.c
@@ -3,7 +3,6 @@
 #include "constraints.h"
 
 static SettingsForSingleWindow border_for_single_window = SETTINGS_FOR_SINGLE_WINDOW_NOBODY_IS_FULLSCREEN;
-static float default_master_area_factor = 0.6;
 static SettingsForSingleWindow gap_for_single_window = SETTINGS_FOR_SINGLE_WINDOW_NOBODY_IS_FULLSCREEN;
 static bool enable_swallowing = true;
 static bool focus_on_wheel = true;
@@ -27,16 +26,6 @@ void settings_set_border_for_single_window(const SettingsForSingleWindow new_bor
 	// TODO: notify WM to rearrange clients
 }
 
-float settings_get_default_master_area_factor()
-{
-	return default_master_area_factor;
-}
-
-void settings_set_default_master_area_factor(const float new_default_master_area_factor)
-{
-	default_master_area_factor = constraints_default_master_area_factor(new_default_master_area_factor);
-}
-
 SettingsForSingleWindow settings_get_gap_for_single_window()
 {
 	return gap_for_single_window;
diff --git a/src/settings.rs b/src/settings.rs
index 800c054..bc11154 100644
--- a/src/settings.rs
+++ b/src/settings.rs
@@ -7,6 +7,7 @@ pub struct Settings {
     bar_on_top_by_default: bool,
     border_width: c_int,
     default_clients_in_master: c_int,
+    default_master_area_factor: c_float,
 }
 
 impl Default for Settings {
@@ -15,6 +16,7 @@ impl Default for Settings {
             bar_on_top_by_default: true,
             border_width: 2,
             default_clients_in_master: 1,
+            default_master_area_factor: 0.6,
         }
     }
 }
@@ -45,4 +47,13 @@ impl Settings {
         self.default_clients_in_master =
             constraints::default_clients_in_master(value);
     }
+
+    pub fn default_master_area_factor(&self) -> c_float {
+        self.default_master_area_factor
+    }
+
+    pub fn default_master_area_factor_set(&mut self, value: c_float) {
+        self.default_master_area_factor =
+            constraints::default_master_area_factor(value);
+    }
 }