diff --git a/cpu/stm32f0/stm32_line.mk b/cpu/stm32f0/stm32_line.mk
new file mode 100644
index 0000000000..b5fe313bad
--- /dev/null
+++ b/cpu/stm32f0/stm32_line.mk
@@ -0,0 +1,27 @@
+# Compute CPU_LINE
+LINE := $(shell echo $(CPU_MODEL) | tr 'a-z-' 'A-Z_' | sed -E -e 's/^STM32F([0-9][0-9][0-9])(.)(.)/\1 \2 \3/')
+TYPE := $(word 1, $(LINE))
+MODEL1 := $(word 2, $(LINE))
+MODEL2 := $(word 3, $(LINE))
+
+ifneq (, $(filter $(TYPE), 030 031 042 070))
+  ifneq (, $(filter $(MODEL2), 4 6))
+    CPU_LINE = STM32F$(TYPE)x6
+  else ifneq (, $(filter $(MODEL2), 8))
+    CPU_LINE = STM32F$(TYPE)x8
+  else ifneq (, $(filter $(MODEL2), B))
+    CPU_LINE = STM32F$(TYPE)xB
+  endif
+else ifneq (, $(filter $(TYPE), 051))
+  CPU_LINE = STM32F$(TYPE)x8
+else ifneq (, $(filter $(TYPE), 071 072))
+  CPU_LINE = STM32F$(TYPE)xB
+else ifneq (, $(filter $(TYPE), 091))
+  CPU_LINE = STM32F$(TYPE)xC
+else
+  CPU_LINE = STM32F$(TYPE)xx
+endif
+
+ifeq ($(CPU_LINE), )
+  $(error Unsupported CPU)
+endif