diff --git a/Firmware/Dcodes.cpp b/Firmware/Dcodes.cpp
index 8a7e63e51..67cf1eb80 100644
--- a/Firmware/Dcodes.cpp
+++ b/Firmware/Dcodes.cpp
@@ -194,8 +194,6 @@ extern float axis_steps_per_unit[NUM_AXIS];
 #endif //0
 #define LOG(args...)
 
-extern uint8_t fsensor_log;
-
     /*!
     *
     ### D-1 - Endless Loop <a href="https://reprap.org/wiki/G-code#G28:_Move_to_Origin_.28Home.29">D-1: Endless Loop</a>
@@ -845,11 +843,13 @@ void dcode_9125()
 		pat9125_y = (int)code_value();
 		LOG("pat9125_y=%d\n", pat9125_y);
 	}
+#ifdef DEBUG_FSENSOR_LOG
 	if (code_seen('L'))
 	{
 		fsensor_log = (int)code_value();
 		LOG("fsensor_log=%d\n", fsensor_log);
 	}
+#endif //DEBUG_FSENSOR_LOG
 }
 #endif //PAT9125
 
diff --git a/Firmware/fsensor.cpp b/Firmware/fsensor.cpp
index cfb378edf..219ab4f85 100755
--- a/Firmware/fsensor.cpp
+++ b/Firmware/fsensor.cpp
@@ -69,8 +69,10 @@ unsigned long fsensor_softfail_last = 0;
 uint8_t fsensor_softfail_ccnt = 0;
 #endif
 
+#ifdef DEBUG_FSENSOR_LOG
 //! log flag: 0=log disabled, 1=log enabled
 uint8_t fsensor_log = 1;
+#endif //DEBUG_FSENSOR_LOG
 
 
 //! @name filament autoload variables
diff --git a/Firmware/fsensor.h b/Firmware/fsensor.h
index 19f968128..4949381b4 100755
--- a/Firmware/fsensor.h
+++ b/Firmware/fsensor.h
@@ -72,6 +72,9 @@ extern bool fsensor_oq_result(void);
 //! @{
 extern void fsensor_st_block_chunk(int cnt);
 
+// debugging
+extern uint8_t fsensor_log;
+
 // There's really nothing to do in block_begin: the stepper ISR likely has
 // called us already at the end of the last block, making this integration
 // redundant. LA1.5 might not always do that during a coasting move, so attempt