diff --git a/firmware/console/binary/tunerstudio.cpp b/firmware/console/binary/tunerstudio.cpp
index 03841e0c8a..05f23131ee 100644
--- a/firmware/console/binary/tunerstudio.cpp
+++ b/firmware/console/binary/tunerstudio.cpp
@@ -482,6 +482,8 @@ static bool isKnownCommand(char command) {
 			|| command == TS_GET_FIRMWARE_VERSION
 			|| command == TS_PERF_TRACE_BEGIN
 			|| command == TS_PERF_TRACE_GET_BUFFER
+			|| command == TS_SD_R_COMMAND
+			|| command == TS_SD_W_COMMAND
 			|| command == TS_GET_CONFIG_ERROR;
 }
 
diff --git a/firmware/integration/rusefi_config.txt b/firmware/integration/rusefi_config.txt
index 61779ff8c0..7a453ced0a 100644
--- a/firmware/integration/rusefi_config.txt
+++ b/firmware/integration/rusefi_config.txt
@@ -1621,7 +1621,7 @@ end_struct
 #define TS_COMPOSITE_DISABLE 2
 
 // Performance tracing
-#define TS_PERF_TRACE_BEGIN 'r'
+#define TS_PERF_TRACE_BEGIN '_'
 #define TS_PERF_TRACE_GET_BUFFER 'b'
 
 // 0x50