diff --git a/esphome/cpp_generator.py b/esphome/cpp_generator.py
index c1476aa728b..e1f76a2cca8 100644
--- a/esphome/cpp_generator.py
+++ b/esphome/cpp_generator.py
@@ -441,7 +441,7 @@ class ProgmemAssignmentExpression(AssignmentExpression):
         super().__init__(type_, "", name, rhs)
 
     def __str__(self):
-        return f"static const {self.type} {self.name}[] PROGMEM = {self.rhs}"
+        return f"static constexpr {self.type} {self.name}[] PROGMEM = {self.rhs}"
 
 
 class StaticConstAssignmentExpression(AssignmentExpression):