diff --git a/bootloaders/riotboot/Makefile b/bootloaders/riotboot/Makefile
index bc19fbe7e0..4800be4f9e 100644
--- a/bootloaders/riotboot/Makefile
+++ b/bootloaders/riotboot/Makefile
@@ -1,35 +1,7 @@
 # Default RIOT bootloader
 APPLICATION = riotboot
 
-# Default testing board
-BOARD ?= samr21-xpro
-
-# Select the boards with riotboot feature
-FEATURES_REQUIRED += riotboot
-
-# Set RIOTBOOT_BUILD to indicate a riotboot application build
-RIOTBOOT_BUILD = 1
-# Provide a define to detect if building the bootloader
-CFLAGS += -DRIOTBOOT
-
-# Disable unused modules
-CFLAGS += -DNDEBUG -DLOG_LEVEL=LOG_NONE
-DISABLE_MODULE += core_init core_msg core_panic
-DISABLE_MODULE += auto_init auto_init_%
-DISABLE_MODULE += pm_layered
-
-# avoid using stdio
-USEMODULE += stdio_null
-
 # Include riotboot flash partition functionality
 USEMODULE += riotboot_slot
 
-# RIOT codebase
-RIOTBASE ?= $(CURDIR)/../../
-
-include $(RIOTBASE)/Makefile.include
-
-# limit riotboot bootloader size
-# TODO: Manage to set this variable for boards which already embed a
-# bootloader, currently it will be overwritten
-ROM_LEN := $(RIOTBOOT_LEN)
+include ../riotboot_common.mk
diff --git a/bootloaders/riotboot_common.mk b/bootloaders/riotboot_common.mk
new file mode 100644
index 0000000000..de4975f943
--- /dev/null
+++ b/bootloaders/riotboot_common.mk
@@ -0,0 +1,29 @@
+# Default testing board
+BOARD ?= samr21-xpro
+
+# Select the boards with riotboot feature
+FEATURES_REQUIRED += riotboot
+
+# Set RIOTBOOT_BUILD to indicate a riotboot application build
+RIOTBOOT_BUILD = 1
+# Provide a define to detect if building the bootloader
+CFLAGS += -DRIOTBOOT
+
+# Disable unused modules
+CFLAGS += -DNDEBUG -DLOG_LEVEL=LOG_NONE
+DISABLE_MODULE += core_init core_msg core_panic
+DISABLE_MODULE += auto_init auto_init_%
+DISABLE_MODULE += pm_layered
+
+# avoid using stdio
+USEMODULE += stdio_null
+
+# RIOT codebase
+RIOTBASE ?= $(CURDIR)/../..
+
+include $(RIOTBASE)/Makefile.include
+
+# limit riotboot bootloader size
+# TODO: Manage to set this variable for boards which already embed a
+# bootloader, currently it will be overwritten
+ROM_LEN := $(RIOTBOOT_LEN)
diff --git a/bootloaders/riotboot_dfu/Makefile b/bootloaders/riotboot_dfu/Makefile
index 0c14a71cf4..86995d3119 100644
--- a/bootloaders/riotboot_dfu/Makefile
+++ b/bootloaders/riotboot_dfu/Makefile
@@ -1,33 +1,12 @@
 # Default RIOT bootloader
 APPLICATION = riotboot_dfu
 
-# Default testing board
-BOARD ?= samr21-xpro
-
-# Select the boards with riotboot feature
-FEATURES_REQUIRED += riotboot
-
-# Set RIOTBOOT_BUILD to indicate a riotboot application build
-RIOTBOOT_BUILD = 1
-# Provide a define to detect if building the bootloader
-CFLAGS += -DRIOTBOOT
-
-# Disable unused modules
-CFLAGS += -DNDEBUG -DLOG_LEVEL=LOG_NONE
-DISABLE_MODULE += core_init core_msg core_panic
-DISABLE_MODULE += auto_init auto_init_%
-
-# avoid using stdio
-USEMODULE += stdio_null
 # Add RIOTBOOT USB DFU integration
 USEMODULE += riotboot_usb_dfu
 
 # Use xtimer for scheduled reboot
 USEMODULE += xtimer
 
-# RIOT codebase
-RIOTBASE ?= $(CURDIR)/../../
-
 # USB device vendor and product ID
 # pid.codes test VID/PID, not globally unique
 
@@ -36,9 +15,4 @@ RIOTBASE ?= $(CURDIR)/../../
 USB_VID ?= 1209
 USB_PID ?= 7D02
 
-include $(RIOTBASE)/Makefile.include
-
-# limit riotboot bootloader size
-# TODO: Manage to set this variable for boards which already embed a
-# bootloader, currently it will be overwritten
-ROM_LEN := $(RIOTBOOT_LEN)
+include ../riotboot_common.mk
diff --git a/bootloaders/riotboot_serial/Makefile b/bootloaders/riotboot_serial/Makefile
index 1bd20aa81f..fdf226bfec 100644
--- a/bootloaders/riotboot_serial/Makefile
+++ b/bootloaders/riotboot_serial/Makefile
@@ -1,14 +1,10 @@
 # Default RIOT bootloader
 APPLICATION = riotboot_serial
 
+# Include riotboot flash partition functionality
+# USEMODULE += riotboot_slot
+
 # Include serial bootloader functionality
 USEMODULE += riotboot_serial
 
-# RIOT codebase
-RIOTBASE ?= $(CURDIR)/../../
-
-include $(RIOTBASE)/Makefile.include
-
-# limit riotboot bootloader size
-RIOTBOOT_SERIAL_LEN ?= $(RIOTBOOT_LEN)
-ROM_LEN := $(RIOTBOOT_SERIAL_LEN)
+include ../riotboot_common.mk