diff --git a/plat/st/common/stm32mp_crypto_lib.c b/plat/st/common/stm32mp_crypto_lib.c
index b3b1d3d..e282115 100644
--- a/plat/st/common/stm32mp_crypto_lib.c
+++ b/plat/st/common/stm32mp_crypto_lib.c
@@ -491,7 +491,7 @@
 	/*
 	 * Not a real derivation yet
 	 *
-	 * But we expect a 32 bytes key, and OTP is only 16 bytes
+	 * We expect a 32 bytes key, if OTP is only 16 bytes
 	 *   => duplicate.
 	 */
 	for (i = 0U, j = len; j < 32U;