diff --git a/src/displayapp/screens/Calculator.cpp b/src/displayapp/screens/Calculator.cpp
index 5f51b88dbd..9143ccf565 100644
--- a/src/displayapp/screens/Calculator.cpp
+++ b/src/displayapp/screens/Calculator.cpp
@@ -16,7 +16,7 @@ Calculator::~Calculator() {
   lv_obj_clean(lv_scr_act());
 }
 
-constexpr char* const buttonMap[] = {
+constexpr const char* const buttonMap[] = {
   "7", "8", "9", Symbols::backspace, "\n", "4", "5", "6", "+ -", "\n", "1", "2", "3", "* /", "\n", "0", ".", "(-)", "=", ""};
 
 Calculator::Calculator() {