Index: simd/x86_64/jdsample-sse2.asm
--- simd/x86_64/jdsample-sse2.asm.orig
+++ simd/x86_64/jdsample-sse2.asm
@@ -61,6 +61,7 @@ PW_EIGHT times 8 dw 8
     GLOBAL_FUNCTION(jsimd_h2v1_fancy_upsample_sse2)
 
 EXTN(jsimd_h2v1_fancy_upsample_sse2):
+    _endbr64
     push        rbp
     mov         rbp, rsp
     collect_args 4
@@ -202,6 +203,7 @@ EXTN(jsimd_h2v1_fancy_upsample_sse2):
     GLOBAL_FUNCTION(jsimd_h2v2_fancy_upsample_sse2)
 
 EXTN(jsimd_h2v2_fancy_upsample_sse2):
+    _endbr64
     push        rbp
     mov         rbp, rsp
     push        r15
@@ -497,6 +499,7 @@ EXTN(jsimd_h2v2_fancy_upsample_sse2):
     GLOBAL_FUNCTION(jsimd_h2v1_upsample_sse2)
 
 EXTN(jsimd_h2v1_upsample_sse2):
+    _endbr64
     push        rbp
     mov         rbp, rsp
     collect_args 4
@@ -583,6 +586,7 @@ EXTN(jsimd_h2v1_upsample_sse2):
     GLOBAL_FUNCTION(jsimd_h2v2_upsample_sse2)
 
 EXTN(jsimd_h2v2_upsample_sse2):
+    _endbr64
     push        rbp
     mov         rbp, rsp
     collect_args 4
