diff --git a/Makefile.include b/Makefile.include
index 1cd4c84197..94c75c4fa5 100644
--- a/Makefile.include
+++ b/Makefile.include
@@ -658,7 +658,7 @@ term: $(TERMDEPS)
 	$(TERMPROG) $(TERMFLAGS)
 
 # Term without the pyterm added logging
-# TERMFLAGS must be exported for `jlink.sh term_rtt`.
+# PYTERMFLAGS must be exported for `jlink.sh term-rtt`.
 cleanterm: export PYTERMFLAGS += --noprefix --no-repeat-command-on-empty-line
 cleanterm: $(TERMDEPS)
 	$(call check_cmd,$(TERMPROG),Terminal program)
diff --git a/boards/hamilton/Makefile.include b/boards/hamilton/Makefile.include
index c88822cb9d..5e5da486c9 100644
--- a/boards/hamilton/Makefile.include
+++ b/boards/hamilton/Makefile.include
@@ -5,7 +5,7 @@ OFLAGS := --gap-fill 0xff
 
 # Configure terminal, hamilton doesn't provide any UART, thus use RTT
 TERMPROG = $(RIOTTOOLS)/jlink/jlink.sh
-TERMFLAGS = term_rtt
+TERMFLAGS = term-rtt
 
 USEMODULE += stdio_rtt
 
diff --git a/boards/ruuvitag/Makefile.include b/boards/ruuvitag/Makefile.include
index 3eae148e81..eff65c33fe 100644
--- a/boards/ruuvitag/Makefile.include
+++ b/boards/ruuvitag/Makefile.include
@@ -1,7 +1,7 @@
 # for this board, we are using Segger's RTT as default terminal interface
 USEMODULE += stdio_rtt
 TERMPROG = $(RIOTTOOLS)/jlink/jlink.sh
-TERMFLAGS = term_rtt
+TERMFLAGS = term-rtt
 
 # use shared Makefile.include
 include $(RIOTBOARD)/common/nrf52xxxdk/Makefile.include
diff --git a/boards/thingy52/Makefile.include b/boards/thingy52/Makefile.include
index 61e16f2acc..8d7bb8eeeb 100644
--- a/boards/thingy52/Makefile.include
+++ b/boards/thingy52/Makefile.include
@@ -1,7 +1,7 @@
 # for this board, we are using Segger's RTT as default terminal interface
 USEMODULE += stdio_rtt
 TERMPROG = $(RIOTTOOLS)/jlink/jlink.sh
-TERMFLAGS = term_rtt
+TERMFLAGS = term-rtt
 
 # use shared Makefile.include
 include $(RIOTBOARD)/common/nrf52/Makefile.include
diff --git a/dist/tools/jlink/jlink.sh b/dist/tools/jlink/jlink.sh
index 03edba36e3..9fff44df0e 100755
--- a/dist/tools/jlink/jlink.sh
+++ b/dist/tools/jlink/jlink.sh
@@ -50,6 +50,9 @@
 # reset:        triggers a hardware reset of the target board
 #
 #
+# term-rtt:     opens a serial terminal using jlink RTT(reak time transfer)
+#
+#
 # @author       Hauke Peteresen <hauke.petersen@fu-berlin.de>
 
 # Set IMAGE_OFFSET to zero by default.
@@ -286,12 +289,12 @@ case "${ACTION}" in
     echo "### Resetting Target ###"
     do_reset "$@"
     ;;
-  term_rtt)
+  term-rtt)
     echo "### Starting RTT terminal ###"
     do_term
     ;;
   *)
-    echo "Usage: $0 {flash|debug|debug-server|reset}"
+    echo "Usage: $0 {flash|debug|debug-server|reset|term-rtt}"
     echo "          flash <binfile>"
     echo "          debug <elffile>"
     ;;