diff --git a/dist/testbed-support/Makefile.iotlab b/dist/testbed-support/Makefile.iotlab
index a541937541ac8eb96d796c821606a949d6969e75..8e121a6aa52b5b21c563e319a0f9a50384861ca9 100644
--- a/dist/testbed-support/Makefile.iotlab
+++ b/dist/testbed-support/Makefile.iotlab
@@ -14,18 +14,18 @@ IOTLAB_DEBUG_NODE   ?= $(shell experiment-cli get -i $(IOTLAB_EXP_ID) --resource
 IOTLAB_AUTHORITY    = "$(IOTLAB_USER)@$(IOTLAB_SITE).iot-lab.info"
 
 ifneq (,$(findstring m3,$(IOTLAB_TYPE)))
-	BINARY := $(ELFFILE)
+  BINARY := $(ELFFILE)
 else
-	BINARY := $(HEXFILE)
+  BINARY := $(HEXFILE)
 endif
 
 ifdef IOTLAB_PHY_NODES
-    NODES_PARAM_BASE = -l$(IOTLAB_SITE),$(firstword $(subst :, ,$(IOTLAB_TYPE))),$(IOTLAB_PHY_NODES)
-    NODES_PARAM = "$(NODES_PARAM_BASE),$(BINARY),$(IOTLAB_PROFILE)"
+  NODES_PARAM_BASE = -l$(IOTLAB_SITE),$(firstword $(subst :, ,$(IOTLAB_TYPE))),$(IOTLAB_PHY_NODES)
+  NODES_PARAM = "$(NODES_PARAM_BASE),$(BINARY),$(IOTLAB_PROFILE)"
 endif
 
 ifdef IOTLAB_EXCLUDE_NODES
-    EXCLUDE_PARAM := "-e$(IOTLAB_SITE),$(firstword $(subst :, ,$(IOTLAB_TYPE))),$(IOTLAB_EXCLUDE_NODES)"
+  EXCLUDE_PARAM := "-e$(IOTLAB_SITE),$(firstword $(subst :, ,$(IOTLAB_TYPE))),$(IOTLAB_EXCLUDE_NODES)"
 endif
 
 $(IOTLAB_AUTH):
@@ -35,23 +35,23 @@ iotlab-exp: $(IOTLAB_AUTH) all
 	$(eval IOTLAB_SITE ?= grenoble)
 
     ifneq (RIOT_EXP,$(IOTLAB_EXP_NAME))
-	    $(eval IOTLAB_EXP_NAME := RIOT_EXP_$(IOTLAB_EXP_NAME))
+	  $(eval IOTLAB_EXP_NAME := RIOT_EXP_$(IOTLAB_EXP_NAME))
     endif
 
     ifndef NODES_PARAM
-	    $(eval NODES_PARAM := "-l$(IOTLAB_NODES),archi=$(IOTLAB_TYPE)+site=$(IOTLAB_SITE),$(BINARY),$(IOTLAB_PROFILE)")
+	  $(eval NODES_PARAM := "-l$(IOTLAB_NODES),archi=$(IOTLAB_TYPE)+site=$(IOTLAB_SITE),$(BINARY),$(IOTLAB_PROFILE)")
     endif
 
     ifeq (,$(Q))
-	    @echo "experiment-cli submit -d $(IOTLAB_DURATION) $(NODES_PARAM) -n $(IOTLAB_EXP_NAME)"
+	  @echo "experiment-cli submit -d $(IOTLAB_DURATION) $(NODES_PARAM) -n $(IOTLAB_EXP_NAME)"
     endif
 	$(eval NEW_ID := $(shell experiment-cli submit -d $(IOTLAB_DURATION) $(NODES_PARAM) -n $(IOTLAB_EXP_NAME) | grep -Eo '[[:digit:]]+'))
 	$(Q)experiment-cli wait -i $(NEW_ID)
 
     ifdef IOTLAB_LOGGING
-	    $(Q)ssh -t $(IOTLAB_AUTHORITY) "tmux new -d -s riot-$(NEW_ID)\
-	    'script -fac "'"'"serial_aggregator -i $(NEW_ID)"'"'"\
-	     RIOT_LOG-$(IOTLAB_EXP_NAME)-$(NEW_ID)'"
+	  $(Q)ssh -t $(IOTLAB_AUTHORITY) "tmux new -d -s riot-$(NEW_ID)\
+	  'script -fac "'"'"serial_aggregator -i $(NEW_ID)"'"'"\
+	   RIOT_LOG-$(IOTLAB_EXP_NAME)-$(NEW_ID)'"
     endif
 
 iotlab-flash: $(IOTLAB_AUTH) iotlab-check-exp all
@@ -83,5 +83,5 @@ iotlab-term: iotlab-check-exp
 
 iotlab-check-exp:
 ifndef IOTLAB_SITE
-	$(eval IOTLAB_SITE         := $(shell experiment-cli get -ri -i $(IOTLAB_EXP_ID) | sed -n 4p | cut -d\" -f2))
+	$(eval IOTLAB_SITE := $(shell experiment-cli get -ri -i $(IOTLAB_EXP_ID) | sed -n 4p | cut -d\" -f2))
 endif