diff --git a/target/s390x/mmu_helper.c b/target/s390x/mmu_helper.c
index 167f1b1455..ca25dadb5b 100644
--- a/target/s390x/mmu_helper.c
+++ b/target/s390x/mmu_helper.c
@@ -374,7 +374,8 @@ static void mmu_handle_skey(target_ulong addr, int rw, int *flags)
  * @param asc    address space control (one of the PSW_ASC_* modes)
  * @param raddr  the translated address is stored to this pointer
  * @param flags  the PAGE_READ/WRITE/EXEC flags are stored to this pointer
- * @param exc    true = inject a program check if a fault occurred
+ * @param tec    the translation exception code if stored to this pointer if
+ *               there is an exception to raise
  * @return       0 = success, != 0, the exception to raise
  */
 int mmu_translate(CPUS390XState *env, target_ulong vaddr, int rw, uint64_t asc,