diff --git a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/Pyr0_Piezo_Sensor_v2.x.x.ino b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/Pyr0_Piezo_Sensor_v2.x.x.ino
index b517e94..07803dc 100644
--- a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/Pyr0_Piezo_Sensor_v2.x.x.ino
+++ b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/Pyr0_Piezo_Sensor_v2.x.x.ino
@@ -64,6 +64,7 @@ The gain STATE is representative of these values:
 //#define VERBOSE true
 
 // Headers, variables, and functions
+include <EEPROM.h>
 #include "LightChrono.h"
 #include "pP_pins.h"
 #include "pP_config.h"
diff --git a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/pP_config.h b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/pP_config.h
index d93a69e..74c5f78 100644
--- a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/pP_config.h
+++ b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/pP_config.h
@@ -17,7 +17,7 @@
 #endif
 
 #if !(defined(LOOP_DUR))
-  int LOOP_DUR = 50;              // duration of time between ADC checks and other loop functions
+  extern int LOOP_DUR; 
 #endif
 
 #if !(defined(TRG_DUR))