diff --git a/fs/dax.c b/fs/dax.c
index 5ae8b71ebadc91eaff464128422ce5571fb4e24e..7436c98b92c82dc43ad1a80fa5b5e49f26ade500 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1436,7 +1436,8 @@ static int dax_iomap_pmd_fault(struct vm_fault *vmf,
 	return result;
 }
 #else
-static int dax_iomap_pmd_fault(struct vm_fault *vmf, struct iomap_ops *ops)
+static int dax_iomap_pmd_fault(struct vm_fault *vmf,
+			       const struct iomap_ops *ops)
 {
 	return VM_FAULT_FALLBACK;
 }