diff --git a/cpu/stm32/dist/irqs/gen_vectors.py b/cpu/stm32/dist/irqs/gen_vectors.py
index 9de7a0d5bc..a391e2f902 100755
--- a/cpu/stm32/dist/irqs/gen_vectors.py
+++ b/cpu/stm32/dist/irqs/gen_vectors.py
@@ -70,7 +70,7 @@ def parse_cmsis(cpu_line):
             # skip line that contains non unicode characters
             continue
         # start filling lines after interrupt Doxygen comment
-        if line.startswith("typedef enum"):
+        if "typedef enum" in line:
             use_line = True
 
         # use a regexp to get the available IRQs