Index: simd/x86_64/jdmrgext-sse2.asm
--- simd/x86_64/jdmrgext-sse2.asm.orig
+++ simd/x86_64/jdmrgext-sse2.asm
@@ -41,6 +41,7 @@
     GLOBAL_FUNCTION(jsimd_h2v1_merged_upsample_sse2)
 
 EXTN(jsimd_h2v1_merged_upsample_sse2):
+    _endbr64
     push        rbp
     mov         rbp, rsp
     push        r15
@@ -448,6 +449,7 @@ EXTN(jsimd_h2v1_merged_upsample_sse2):
     GLOBAL_FUNCTION(jsimd_h2v2_merged_upsample_sse2)
 
 EXTN(jsimd_h2v2_merged_upsample_sse2):
+    _endbr64
     push        rbp
     mov         rbp, rsp
     collect_args 4
