diff --git a/library/rsa.c b/library/rsa.c
index 5366abc..bf24a09 100644
--- a/library/rsa.c
+++ b/library/rsa.c
@@ -274,7 +274,7 @@
 
     if( pq_missing )
     {
-        ret = mbedtls_rsa_deduce_primes( &ctx->N, &ctx->D, &ctx->E,
+        ret = mbedtls_rsa_deduce_primes( &ctx->N, &ctx->E, &ctx->D,
                                          &ctx->P, &ctx->Q );
         if( ret != 0 )
             return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA + ret );
diff --git a/library/rsa_internal.c b/library/rsa_internal.c
index 3b54fde..f65f0df 100644
--- a/library/rsa_internal.c
+++ b/library/rsa_internal.c
@@ -66,7 +66,7 @@
  *
  */
 int mbedtls_rsa_deduce_primes( mbedtls_mpi const *N,
-                     mbedtls_mpi const *D, mbedtls_mpi const *E,
+                     mbedtls_mpi const *E, mbedtls_mpi const *D,
                      mbedtls_mpi *P, mbedtls_mpi *Q )
 {
     int ret = 0;