diff --git a/IO_RotaryEncoder.h b/IO_RotaryEncoder.h
index 09d0c4d..00a8249 100644
--- a/IO_RotaryEncoder.h
+++ b/IO_RotaryEncoder.h
@@ -98,7 +98,8 @@ private:
 
   void _write(VPIN vpin, int value) override {
     if (vpin == _firstVpin + 1) {
-      byte _feedbackBuffer[2] = {RE_OP, value};
+      if (value != 0) value = 0x01;
+      byte _feedbackBuffer[2] = {RE_OP, (byte)value};
       I2CManager.write(_I2CAddress, _feedbackBuffer, 2);
     }
   }
diff --git a/version.h b/version.h
index 5cb5cea..c29f773 100644
--- a/version.h
+++ b/version.h
@@ -4,7 +4,8 @@
 #include "StringFormatter.h"
 
 
-#define VERSION "4.2.37"
+#define VERSION "4.2.38"
+// 4.2.38 - Clean up compiler warning when IO_RotaryEncoder.h included
 // 4.2.37 - Add new FLAGS HAL device for communications to/from EX-RAIL;
 //        - Fix diag display of high VPINs within IODevice class.
 // 4.2.36 - do not broadcast a turnout state that has not changed