diff --git a/core/lib/libtomcrypt/src/tee_ltc_provider.c b/core/lib/libtomcrypt/src/tee_ltc_provider.c
index eb5729cb944..69fae64663a 100644
--- a/core/lib/libtomcrypt/src/tee_ltc_provider.c
+++ b/core/lib/libtomcrypt/src/tee_ltc_provider.c
@@ -2927,7 +2927,8 @@ static TEE_Result prng_read(void *buf, size_t blen)
 }
 
 /* Called as a result of rng_generate() below */
-static TEE_Result _tee_ltc_prng_add_entropy(const uint8_t *inbuf, size_t len)
+static TEE_Result _tee_ltc_prng_add_entropy(
+	const uint8_t *inbuf __maybe_unused, size_t len __maybe_unused)
 {
 #if defined(CFG_WITH_SOFTWARE_PRNG)
 	int err;