diff --git a/programs/aes/aescrypt2.c b/programs/aes/aescrypt2.c
index 1cedcc7..4c1f8ea 100644
--- a/programs/aes/aescrypt2.c
+++ b/programs/aes/aescrypt2.c
@@ -320,7 +320,7 @@
         }
 
         /*
-         * Substract the IV + HMAC length.
+         * Subtract the IV + HMAC length.
          */
         filesize -= ( 16 + 32 );
 
diff --git a/programs/aes/crypt_and_hash.c b/programs/aes/crypt_and_hash.c
index 5aa0bfe..d2845de 100644
--- a/programs/aes/crypt_and_hash.c
+++ b/programs/aes/crypt_and_hash.c
@@ -390,7 +390,7 @@
         }
 
         /*
-         * Substract the IV + HMAC length.
+         * Subtract the IV + HMAC length.
          */
         filesize -= ( 16 + md_get_size( md_info ) );