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-rw-r--r--src/crypto/sha1/sha1block_arm.s2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/crypto/sha1/sha1block_arm.s b/src/crypto/sha1/sha1block_arm.s
index 2236533ab4..209b1d89ae 100644
--- a/src/crypto/sha1/sha1block_arm.s
+++ b/src/crypto/sha1/sha1block_arm.s
@@ -4,6 +4,8 @@
//
// ARM version of md5block.go
+//go:build !purego
+
#include "textflag.h"
// SHA-1 block routine. See sha1block.go for Go equivalent.