diff --git a/library/rsa_internal.c b/library/rsa_internal.c
index 5e35dbf..e28ca50 100644
--- a/library/rsa_internal.c
+++ b/library/rsa_internal.c
@@ -370,7 +370,7 @@
 #endif /* MBEDTLS_GENPRIME */
 
     /*
-     * Step 2: Check that 1 < N = PQ
+     * Step 2: Check that 1 < N = P * Q
      */
 
     if( P != NULL && Q != NULL && N != NULL )