diff --git a/src/libsodium/crypto_stream/chacha20/vec/stream_chacha20_vec.c b/src/libsodium/crypto_stream/chacha20/vec/stream_chacha20_vec.c
index f211b722..c18885e7 100644
--- a/src/libsodium/crypto_stream/chacha20/vec/stream_chacha20_vec.c
+++ b/src/libsodium/crypto_stream/chacha20/vec/stream_chacha20_vec.c
@@ -145,7 +145,7 @@ chacha_encrypt_bytes(chacha_ctx *ctx, const uint8_t *in, uint8_t *out,
     unsigned long long  i;
 
     if (inlen > 64ULL * (1ULL << 32) - 64ULL) {
-        abort();
+        abort(); /* LCOV_EXCL_LINE */
     }
     s0 = LOAD_ALIGNED(chacha_const);
     s1 = ctx->s1;