diff --git a/esphome/components/sx1509/sx1509.cpp b/esphome/components/sx1509/sx1509.cpp
index bca06f460cd..91cbb2b010c 100644
--- a/esphome/components/sx1509/sx1509.cpp
+++ b/esphome/components/sx1509/sx1509.cpp
@@ -348,7 +348,6 @@ void SX1509Component::enable_pin_interrupt_(uint8_t pin) {
 
   // Configure sense to trigger on both edges
   // Sense registers use 2 bits per pin, 4 pins per byte
-  static constexpr uint8_t SENSE_BOTH_EDGES = 0x03;
   uint8_t sense_reg = pin < 4    ? REG_SENSE_LOW_A
                       : pin < 8  ? REG_SENSE_HIGH_A
                       : pin < 12 ? REG_SENSE_LOW_B
diff --git a/esphome/components/sx1509/sx1509_registers.h b/esphome/components/sx1509/sx1509_registers.h
index 9712cacf9b2..6bddaf7694d 100644
--- a/esphome/components/sx1509/sx1509_registers.h
+++ b/esphome/components/sx1509/sx1509_registers.h
@@ -57,6 +57,8 @@ const uint8_t REG_SENSE_HIGH_B = 0x14;  //    RegSenseHighB Sense register for I
 const uint8_t REG_SENSE_LOW_B = 0x15;   //    RegSenseLowB Sense register for I/O[11:8] 0000 0000
 const uint8_t REG_SENSE_HIGH_A = 0x16;  //    RegSenseHighA Sense register for I/O[7:4] 0000 0000
 const uint8_t REG_SENSE_LOW_A = 0x17;   //    RegSenseLowA Sense register for I/O[3:0] 0000 0000
+// Sense register values (2 bits per pin): 00=None, 01=Rising, 10=Falling, 11=Both
+const uint8_t SENSE_BOTH_EDGES = 0x03;
 const uint8_t REG_INTERRUPT_SOURCE_B =
     0x18;  //    RegInterruptSourceB Interrupt source register _ I/O[15_8] (Bank B) 0000 0000
 const uint8_t REG_INTERRUPT_SOURCE_A =