diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index eecc4142764c..f17bca8ed2ce 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -359,7 +359,7 @@ int singlestepping(void * t)
 /*
  * Only x86 and x86_64 have an arch_align_stack().
  * All other arches have "#define arch_align_stack(x) (x)"
- * in their asm/system.h
+ * in their asm/exec.h
  * As this is included in UML from asm-um/system-generic.h,
  * we can use it to behave as the subarch does.
  */