diff --git a/src/sig_stfl/sig_stfl.c b/src/sig_stfl/sig_stfl.c
index 042e753f4..044434982 100644
--- a/src/sig_stfl/sig_stfl.c
+++ b/src/sig_stfl/sig_stfl.c
@@ -36,8 +36,8 @@ OQS_API const char *OQS_SIG_STFL_alg_identifier(size_t i) {
 		OQS_SIG_STFL_alg_xmss_shake256_h16,
 		OQS_SIG_STFL_alg_xmss_shake256_h20,
 		OQS_SIG_STFL_alg_xmss_sha256_h10_192,
-        OQS_SIG_STFL_alg_xmss_sha256_h16_192,
-        OQS_SIG_STFL_alg_xmss_sha256_h20_192,
+		OQS_SIG_STFL_alg_xmss_sha256_h16_192,
+		OQS_SIG_STFL_alg_xmss_sha256_h20_192,
 		OQS_SIG_STFL_alg_xmssmt_sha256_h20_2,
 		OQS_SIG_STFL_alg_xmssmt_sha256_h20_4,
 		OQS_SIG_STFL_alg_xmssmt_sha256_h40_2,