diff --git a/crypto/chacha/asm/chacha-armv4.pl b/crypto/chacha/asm/chacha-armv4.pl
index c90306e45c93b..d3fadcc63d333 100755
--- a/crypto/chacha/asm/chacha-armv4.pl
+++ b/crypto/chacha/asm/chacha-armv4.pl
@@ -172,8 +172,10 @@ sub ROUND {
 #include "arm_arch.h"
 
 .text
-#if defined(__thumb2__)
+#if defined(__thumb2__) || defined(__clang__)
 .syntax	unified
+#endif
+#if defined(__thumb2__)
 .thumb
 #else
 .code	32