diff --git a/Settings.c b/Settings.c
index 3c93bcd2..ab1927de 100644
--- a/Settings.c
+++ b/Settings.c
@@ -262,7 +262,7 @@ static void writeFields(FILE* fd, const ProcessField* fields, const char* name)
    fprintf(fd, "\n");
 }
 
-static void writeMeters(Settings* this, FILE* fd, int column) {
+static void writeMeters(const Settings* this, FILE* fd, int column) {
    const char* sep = "";
    for (int i = 0; i < this->columns[column].len; i++) {
       fprintf(fd, "%s%s", sep, this->columns[column].names[i]);
@@ -271,7 +271,7 @@ static void writeMeters(Settings* this, FILE* fd, int column) {
    fprintf(fd, "\n");
 }
 
-static void writeMeterModes(Settings* this, FILE* fd, int column) {
+static void writeMeterModes(const Settings* this, FILE* fd, int column) {
    const char* sep = "";
    for (int i = 0; i < this->columns[column].len; i++) {
       fprintf(fd, "%s%d", sep, this->columns[column].modes[i]);
@@ -280,7 +280,7 @@ static void writeMeterModes(Settings* this, FILE* fd, int column) {
    fprintf(fd, "\n");
 }
 
-bool Settings_write(Settings* this) {
+bool Settings_write(const Settings* this) {
    FILE* fd = fopen(this->filename, "w");
    if (fd == NULL)
       return false;
diff --git a/Settings.h b/Settings.h
index 80ced433..c18173b4 100644
--- a/Settings.h
+++ b/Settings.h
@@ -87,7 +87,7 @@ static inline int Settings_getActiveDirection(const Settings* this) {
 
 void Settings_delete(Settings* this);
 
-bool Settings_write(Settings* this);
+bool Settings_write(const Settings* this);
 
 Settings* Settings_new(int initialCpuCount);