Index: simd/x86_64/jdmrgext-avx2.asm
--- simd/x86_64/jdmrgext-avx2.asm.orig
+++ simd/x86_64/jdmrgext-avx2.asm
@@ -42,6 +42,7 @@
     GLOBAL_FUNCTION(jsimd_h2v1_merged_upsample_avx2)
 
 EXTN(jsimd_h2v1_merged_upsample_avx2):
+    _endbr64
     push        rbp
     mov         rbp, rsp
     push        r15
@@ -506,6 +507,7 @@ EXTN(jsimd_h2v1_merged_upsample_avx2):
     GLOBAL_FUNCTION(jsimd_h2v2_merged_upsample_avx2)
 
 EXTN(jsimd_h2v2_merged_upsample_avx2):
+    _endbr64
     push        rbp
     mov         rbp, rsp
     collect_args 4
