diff --git a/src/simd/memchr2.rs b/src/simd/memchr2.rs
index d3a9b2d3d5b..9db26e6f5ac 100644
--- a/src/simd/memchr2.rs
+++ b/src/simd/memchr2.rs
@@ -26,6 +26,9 @@ unsafe fn memchr2_raw(needle1: u8, needle2: u8, beg: *const u8, end: *const u8)
 
     #[cfg(target_arch = "aarch64")]
     return unsafe { memchr2_neon(needle1, needle2, beg, end) };
+
+    #[allow(unreachable_code)]
+    return unsafe { memchr2_fallback(needle1, needle2, beg, end) };
 }
 
 unsafe fn memchr2_fallback(