diff --git a/internal/encryption/t544/cpuid_amd64.go b/internal/encryption/t544/cpuid_amd64.go
deleted file mode 100644
index a8e21a9..0000000
--- a/internal/encryption/t544/cpuid_amd64.go
+++ /dev/null
@@ -1,10 +0,0 @@
-//go:build amd64
-
-package t544
-
-func cpuid(op uint32) (eax, ebx, ecx, edx uint32)
-
-var canusesse2 = func() bool {
-	_, _, _, d := cpuid(1)
-	return d&(1<<26) > 0
-}()
diff --git a/internal/encryption/t544/cpuid_amd64.s b/internal/encryption/t544/cpuid_amd64.s
deleted file mode 100644
index 98f50a2..0000000
--- a/internal/encryption/t544/cpuid_amd64.s
+++ /dev/null
@@ -1,15 +0,0 @@
-//go:build amd64
-// +build amd64
-
-// Copyright (c) 2015 Klaus Post, released under MIT License. See LICENSE file.
-
-// func cpuid(op uint32) (eax, ebx, ecx, edx uint32)
-TEXT ·cpuid(SB), 7, $0
-    XORQ CX, CX
-    MOVL op+0(FP), AX
-    CPUID
-    MOVL AX, eax+8(FP)
-    MOVL BX, ebx+12(FP)
-    MOVL CX, ecx+16(FP)
-    MOVL DX, edx+20(FP)
-    RET
diff --git a/internal/encryption/t544/t544.go b/internal/encryption/t544/t544.go
index 9cb99f1..321fcb1 100644
--- a/internal/encryption/t544/t544.go
+++ b/internal/encryption/t544/t544.go
@@ -24,10 +24,8 @@ var (
 )
 
 func init() {
-	if canusesse2 {
-		encryption.T544Signer["8.9.35.10440"] = sign
-		encryption.T544Signer["8.9.38.10545"] = sign
-	}
+	encryption.T544Signer["8.9.35.10440"] = sign
+	encryption.T544Signer["8.9.38.10545"] = sign
 }
 
 // sign t544 algorithm