diff --git a/common/extpower_gpio.c b/common/extpower_gpio.c
index 569d674157..c9e62b71e2 100644
--- a/common/extpower_gpio.c
+++ b/common/extpower_gpio.c
@@ -12,8 +12,6 @@
 #include "host_command.h"
 #include "timer.h"
 
-#define EXTPOWER_DEBOUNCE_US  (30 * MSEC)
-
 static int debounced_extpower_presence;
 
 int extpower_is_present(void)
@@ -45,7 +43,8 @@ DECLARE_DEFERRED(extpower_deferred);
 void extpower_interrupt(enum gpio_signal signal)
 {
 	/* Trigger deferred notification of external power change */
-	hook_call_deferred(&extpower_deferred_data, EXTPOWER_DEBOUNCE_US);
+	hook_call_deferred(&extpower_deferred_data,
+			CONFIG_EXTPOWER_DEBOUNCE_MS * MSEC);
 }
 
 static void extpower_init(void)
diff --git a/include/config.h b/include/config.h
index f50602d2df..5ccb5ce39e 100644
--- a/include/config.h
+++ b/include/config.h
@@ -812,6 +812,9 @@
 /* Support detecting external power presence via a GPIO */
 #undef CONFIG_EXTPOWER_GPIO
 
+/* Default debounce time for external power signal */
+#define CONFIG_EXTPOWER_DEBOUNCE_MS 30
+
 /*****************************************************************************/
 /* Number of cooling fans. Undef if none. */
 #undef CONFIG_FANS