diff --git a/firmware/gen_config.sh b/firmware/gen_config.sh
index 3fd1cba4bb..6b26a35c86 100644
--- a/firmware/gen_config.sh
+++ b/firmware/gen_config.sh
@@ -34,7 +34,7 @@ java -DSystemOut.name=gen_config \
  -signature tunerstudio/signature_all.txt \
  -romraider_destination ../java_console/rusefi.xml
 
-[ $? -eq 0 ] || (echo "ERROR generating default"; exit -1)
+[ $? -eq 0 ] || (echo "ERROR generating default"; exit 1)
 
 if [ -z "${TS_PATH}" ]; then
  echo "TS_PATH not defined"
@@ -48,7 +48,7 @@ for BOARD in "microrusefi mre" "frankenso fra" "prometheus pth" "proteus pro"; d
  BOARD_NAME="${BOARD% *}"
  BOARD_SHORT_NAME="${BOARD#* }"
  sh gen_config_board.sh $BOARD_NAME $BOARD_SHORT_NAME
- [ $? -eq 0 ] || (echo "ERROR generating board $BOARD_NAME $BOARD_SHORT_NAME"; exit -1)
+ [ $? -eq 0 ] || (echo "ERROR generating board $BOARD_NAME $BOARD_SHORT_NAME"; exit 1)
 done
 
 cd config/boards/kinetis/config
diff --git a/firmware/gen_config_board.sh b/firmware/gen_config_board.sh
index 77bd6a1bd6..03d4ff5b99 100644
--- a/firmware/gen_config_board.sh
+++ b/firmware/gen_config_board.sh
@@ -27,7 +27,7 @@ java -DSystemOut.name=gen_config_board \
 	-enumInputFile controllers/algo/rusefi_enums.h \
 	-enumInputFile controllers/algo/rusefi_hw_enums.h
 
-[ $? -eq 0 ] || (echo "ERROR generating TunerStudio config for ${BOARDNAME}"; exit -1)
+[ $? -eq 0 ] || (echo "ERROR generating TunerStudio config for ${BOARDNAME}"; exit 1)
 
 java -DSystemOut.name=gen_config_board \
 	-jar ../java_tools/ConfigDefinition.jar \
@@ -41,7 +41,7 @@ java -DSystemOut.name=gen_config_board \
 	-prepend tunerstudio/${BOARDNAME}_prefix.txt \
 	-prepend config/boards/${BOARDNAME}/prepend.txt
 
-[ $? -eq 0 ] || (echo "ERROR generating TunerStudio config for ${BOARDNAME}"; exit -1)
+[ $? -eq 0 ] || (echo "ERROR generating TunerStudio config for ${BOARDNAME}"; exit 1)
 
 if [ -z "${TS_PATH}" ]; then
 	echo "TS_PATH not defined"
diff --git a/firmware/tunerstudio/upload.sh b/firmware/tunerstudio/upload.sh
index 1edf5c5a7b..350d386fc7 100755
--- a/firmware/tunerstudio/upload.sh
+++ b/firmware/tunerstudio/upload.sh
@@ -36,7 +36,7 @@ for f in *.ini; do if [[ -f "$f" ]]; then
       retVal=$?
       if [ $retVal -ne 0 ]; then
         echo "Upload failed"
-        exit -1
+        exit 1
       fi
       echo "* upload done!"
     fi