Index: src/libcryptobox/chacha20/avx.S
--- src/libcryptobox/chacha20/avx.S.orig
+++ src/libcryptobox/chacha20/avx.S
@@ -3,6 +3,7 @@
 SECTION_TEXT
 
 GLOBAL_HIDDEN_FN chacha_blocks_avx
+endbr64
 chacha_blocks_avx_local:
 pushq %rbx
 pushq %rbp
@@ -498,6 +499,7 @@ ret
 FN_END chacha_blocks_avx
 
 GLOBAL_HIDDEN_FN hchacha_avx
+endbr64
 hchacha_avx_local:
 LOAD_VAR_PIC chacha_constants, %rax
 vmovdqa 0(%rax), %xmm0
@@ -553,6 +555,7 @@ ret
 FN_END hchacha_avx
 
 GLOBAL_HIDDEN_FN_EXT chacha_avx, 6, 16
+endbr64
 pushq %rbp
 movq %rsp, %rbp
 subq $64, %rsp
@@ -581,6 +584,7 @@ ret
 FN_END chacha_avx
 
 GLOBAL_HIDDEN_FN_EXT xchacha_avx, 6, 16
+endbr64
 pushq %rbp
 pushq %rbx
 movq %rsp, %rbp
