diff --git a/examples/dtls-echo/Makefile b/examples/dtls-echo/Makefile
index 7f9f7c102646f236d6ae58103ad4a2c4846ce741..411291f7630d15b89b4f5e0478184b2164ed3882 100644
--- a/examples/dtls-echo/Makefile
+++ b/examples/dtls-echo/Makefile
@@ -40,7 +40,7 @@ USEMODULE += ps
 
 #TinyDTLs (crypto.c) made use of pthread
  ifneq ($(BOARD),native)
- USEMODULE += pthread
+   USEMODULE += pthread
  endif
 
 # Comment this out to disable code in RIOT that does safety checking
diff --git a/examples/gnrc_border_router/Makefile b/examples/gnrc_border_router/Makefile
index dc98f837240bd07089428328dc2238f803dae929..53961a91ee52840e7085de834fcef4e7f594f5af 100644
--- a/examples/gnrc_border_router/Makefile
+++ b/examples/gnrc_border_router/Makefile
@@ -21,13 +21,13 @@ BOARD_BLACKLIST += mips-malta pic32-wifire pic32-clicker# No full UART available
 # use ethos (ethernet over serial) for network communication and stdio over
 # UART, but not on native, as native has a tap interface towards the host.
 ifeq (,$(filter native,$(BOARD)))
-GNRC_NETIF_NUMOF := 2
-USEMODULE += ethos gnrc_netdev
+  GNRC_NETIF_NUMOF := 2
+  USEMODULE += ethos gnrc_netdev
 
-# ethos baudrate can be configured from make command
-ETHOS_BAUDRATE ?= 115200
-CFLAGS += '-DETHOS_UART=UART_DEV(0)' -DETHOS_BAUDRATE=$(ETHOS_BAUDRATE) -DUSE_ETHOS_FOR_STDIO
-FEATURES_REQUIRED += periph_uart
+  # ethos baudrate can be configured from make command
+  ETHOS_BAUDRATE ?= 115200
+  CFLAGS += '-DETHOS_UART=UART_DEV(0)' -DETHOS_BAUDRATE=$(ETHOS_BAUDRATE) -DUSE_ETHOS_FOR_STDIO
+  FEATURES_REQUIRED += periph_uart
 endif
 
 # SLIP legacy compatibility
diff --git a/examples/microcoap_server/Makefile b/examples/microcoap_server/Makefile
index c11a9e57f2f5ad7a2400d972148793e7ded3ed26..f34d00ba64e289c47d8d7444deac22219d5598a7 100644
--- a/examples/microcoap_server/Makefile
+++ b/examples/microcoap_server/Makefile
@@ -40,11 +40,11 @@ USEMODULE += shell_commands
 LOW_MEMORY_BOARDS := nucleo-f334
 
 ifneq (,$(filter $(BOARD),$(LOW_MEMORY_BOARDS)))
-$(info Using low-memory configuration for microcoap_server.)
-## low-memory tuning values
-# lower pktbuf buffer size
-CFLAGS += -DGNRC_PKTBUF_SIZE=1000
-USEMODULE += prng_minstd
+  $(info Using low-memory configuration for microcoap_server.)
+  ## low-memory tuning values
+  # lower pktbuf buffer size
+  CFLAGS += -DGNRC_PKTBUF_SIZE=1000
+  USEMODULE += prng_minstd
 endif
 
 # Change this to 0 show compiler invocation lines by default:
diff --git a/examples/nanocoap_server/Makefile b/examples/nanocoap_server/Makefile
index c079340c4d3841c9a659ad58d7f9c11e22911fd6..bc42fcb766c4cd00eeb62839891a401d99878c13 100644
--- a/examples/nanocoap_server/Makefile
+++ b/examples/nanocoap_server/Makefile
@@ -42,11 +42,11 @@ USEMODULE += shell_commands
 LOW_MEMORY_BOARDS := nucleo-f334
 
 ifneq (,$(filter $(BOARD),$(LOW_MEMORY_BOARDS)))
-$(info Using low-memory configuration for microcoap_server.)
-## low-memory tuning values
-# lower pktbuf buffer size
-CFLAGS += -DGNRC_PKTBUF_SIZE=1000
-USEMODULE += prng_minstd
+  $(info Using low-memory configuration for microcoap_server.)
+  ## low-memory tuning values
+  # lower pktbuf buffer size
+  CFLAGS += -DGNRC_PKTBUF_SIZE=1000
+  USEMODULE += prng_minstd
 endif
 
 # Change this to 0 show compiler invocation lines by default: