diff --git a/sys/arm/include/setjmp.h b/sys/arm/include/setjmp.h
index 2090c5d15f4..490df1036e2 100644
--- a/sys/arm/include/setjmp.h
+++ b/sys/arm/include/setjmp.h
@@ -44,7 +44,7 @@
  *	44-45	d14		(vfp register d14)
  *	46-47	d15		(vfp register d15)
  *
- * The magic number number identifies the jmp_buf and
+ * The magic number identifies the jmp_buf and
  * how the buffer was created as well as providing
  * a sanity check
  *