diff --git a/Firmware/Configuration.h b/Firmware/Configuration.h
index dd803c9d..48831f08 100644
--- a/Firmware/Configuration.h
+++ b/Firmware/Configuration.h
@@ -9,7 +9,7 @@
 
 // Firmware version
 #define FW_version "3.1.1-RC3"
-#define FW_build   138
+#define FW_build   138m1
 //#define FW_build   --BUILD-NUMBER--
 #define FW_version_build FW_version " b" STR(FW_build)
 
diff --git a/Firmware/language_all.cpp b/Firmware/language_all.cpp
index d2546d64..d7d81823 100644
--- a/Firmware/language_all.cpp
+++ b/Firmware/language_all.cpp
@@ -1541,12 +1541,12 @@ const char * const MSG_SD_WRITE_TO_FILE_LANG_TABLE[1] PROGMEM = {
 	MSG_SD_WRITE_TO_FILE_EN
 };
 
-const char MSG_SECOND_SERIAL_OFF_EN[] PROGMEM = "2nd USART   [off]";
+const char MSG_SECOND_SERIAL_OFF_EN[] PROGMEM = "rPi port    [off]";
 const char * const MSG_SECOND_SERIAL_OFF_LANG_TABLE[1] PROGMEM = {
 	MSG_SECOND_SERIAL_OFF_EN
 };
 
-const char MSG_SECOND_SERIAL_ON_EN[] PROGMEM = "2nd USART    [on]";
+const char MSG_SECOND_SERIAL_ON_EN[] PROGMEM = "rPi port     [on]";
 const char * const MSG_SECOND_SERIAL_ON_LANG_TABLE[1] PROGMEM = {
 	MSG_SECOND_SERIAL_ON_EN
 };
diff --git a/Firmware/language_en.h b/Firmware/language_en.h
index 637324a0..463c68fd 100644
--- a/Firmware/language_en.h
+++ b/Firmware/language_en.h
@@ -386,5 +386,5 @@
 #define(length=17, lines=1) MSG_SORT_NONE						"Sort: [None]"
 #define(length=20, lines=1) MSG_SORTING							"Sorting files"
 #define(length=20, lines=4) MSG_FILE_CNT						"Some files will not be sorted. Max. No. of files in 1 folder for sorting is 100."
-#define(length=17, lines=1) MSG_SECOND_SERIAL_ON				"2nd USART    [on]"
-#define(length=17, lines=1) MSG_SECOND_SERIAL_OFF				"2nd USART   [off]"
+#define(length=17, lines=1) MSG_SECOND_SERIAL_ON				"rPi port     [on]"
+#define(length=17, lines=1) MSG_SECOND_SERIAL_OFF				"rPi port    [off]"