diff --git a/include/mbedtls/rsa.h b/include/mbedtls/rsa.h
index 0fde575f4..3f453f684 100644
--- a/include/mbedtls/rsa.h
+++ b/include/mbedtls/rsa.h
@@ -1080,9 +1080,6 @@ int mbedtls_rsa_rsassa_pss_verify( mbedtls_rsa_context *ctx,
  * \note           The \p hash_id in the RSA context is ignored.
  *
  * \param ctx      The initialized RSA public key context to use.
- * \param f_rng    The RNG function to use. If \p mode is #MBEDTLS_RSA_PRIVATE,
- *                 this is used for blinding and should be provided; see
- *                 mbedtls_rsa_private() for more. Otherwise, it is ignored.
  * \param mode     The mode of operation. This must be either
  *                 #MBEDTLS_RSA_PUBLIC or #MBEDTLS_RSA_PRIVATE.
  * \param md_alg   The message-digest algorithm used to hash the original data.
@@ -1105,7 +1102,6 @@ int mbedtls_rsa_rsassa_pss_verify( mbedtls_rsa_context *ctx,
  * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
  */
 int mbedtls_rsa_rsassa_pss_verify_ext( mbedtls_rsa_context *ctx,
-                               int (*f_rng)(void *, unsigned char *, size_t),
                                int mode,
                                mbedtls_md_type_t md_alg,
                                unsigned int hashlen,
diff --git a/library/pk.c b/library/pk.c
index e0dedecc3..65a4d0c0f 100644
--- a/library/pk.c
+++ b/library/pk.c
@@ -367,7 +367,7 @@ int mbedtls_pk_verify_ext( mbedtls_pk_type_t type, const void *options,
             return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
 
         ret = mbedtls_rsa_rsassa_pss_verify_ext( mbedtls_pk_rsa( *ctx ),
-                NULL, MBEDTLS_RSA_PUBLIC,
+                MBEDTLS_RSA_PUBLIC,
                 md_alg, (unsigned int) hash_len, hash,
                 pss_opts->mgf1_hash_id,
                 pss_opts->expected_salt_len,
diff --git a/library/rsa.c b/library/rsa.c
index 6b18fe7cf..db684c8fa 100644
--- a/library/rsa.c
+++ b/library/rsa.c
@@ -2147,7 +2147,6 @@ int mbedtls_rsa_pkcs1_sign( mbedtls_rsa_context *ctx,
  * Implementation of the PKCS#1 v2.1 RSASSA-PSS-VERIFY function
  */
 int mbedtls_rsa_rsassa_pss_verify_ext( mbedtls_rsa_context *ctx,
-                               int (*f_rng)(void *, unsigned char *, size_t),
                                int mode,
                                mbedtls_md_type_t md_alg,
                                unsigned int hashlen,
@@ -2186,7 +2185,7 @@ int mbedtls_rsa_rsassa_pss_verify_ext( mbedtls_rsa_context *ctx,
 
     ret = ( mode == MBEDTLS_RSA_PUBLIC )
           ? mbedtls_rsa_public(  ctx, sig, buf )
-          : mbedtls_rsa_private( ctx, f_rng, NULL, sig, buf );
+          : mbedtls_rsa_private( ctx, NULL, NULL, sig, buf );
 
     if( ret != 0 )
         return( ret );
@@ -2312,7 +2311,7 @@ int mbedtls_rsa_rsassa_pss_verify( mbedtls_rsa_context *ctx,
                              ? (mbedtls_md_type_t) ctx->hash_id
                              : md_alg;
 
-    return( mbedtls_rsa_rsassa_pss_verify_ext( ctx, NULL,
+    return( mbedtls_rsa_rsassa_pss_verify_ext( ctx,
                                                MBEDTLS_RSA_PUBLIC,
                                                md_alg, hashlen, hash,
                                                mgf1_hash_id,
diff --git a/tests/suites/test_suite_pkcs1_v21.function b/tests/suites/test_suite_pkcs1_v21.function
index 82f33d610..c52edcb89 100644
--- a/tests/suites/test_suite_pkcs1_v21.function
+++ b/tests/suites/test_suite_pkcs1_v21.function
@@ -248,7 +248,7 @@ void pkcs1_rsassa_pss_verify_ext( int mod, data_t * input_N, data_t * input_E,
                                            hash_len, hash_result,
                                            result_str->x ) == result_simple );
 
-    TEST_ASSERT( mbedtls_rsa_rsassa_pss_verify_ext( &ctx, NULL, MBEDTLS_RSA_PUBLIC,
+    TEST_ASSERT( mbedtls_rsa_rsassa_pss_verify_ext( &ctx, MBEDTLS_RSA_PUBLIC,
                                         msg_digest_id, hash_len, hash_result,
                                         mgf_hash, salt_len,
                                         result_str->x ) == result_full );
diff --git a/tests/suites/test_suite_rsa.function b/tests/suites/test_suite_rsa.function
index 05886ffba..b822ed9ea 100644
--- a/tests/suites/test_suite_rsa.function
+++ b/tests/suites/test_suite_rsa.function
@@ -333,26 +333,26 @@ void rsa_invalid_param( )
                                                            buf ) );
 
     TEST_INVALID_PARAM_RET( MBEDTLS_ERR_RSA_BAD_INPUT_DATA,
-                            mbedtls_rsa_rsassa_pss_verify_ext( NULL, NULL,
+                            mbedtls_rsa_rsassa_pss_verify_ext( NULL,
                                                                MBEDTLS_RSA_PUBLIC,
                                                                0, sizeof( buf ),
                                                                buf,
                                                                0, 0,
                                                                buf ) );
     TEST_INVALID_PARAM_RET( MBEDTLS_ERR_RSA_BAD_INPUT_DATA,
-                            mbedtls_rsa_rsassa_pss_verify_ext( &ctx, NULL,
+                            mbedtls_rsa_rsassa_pss_verify_ext( &ctx,
                                                                MBEDTLS_RSA_PUBLIC,
                                                                0, sizeof( buf ),
                                                                NULL, 0, 0,
                                                                buf ) );
     TEST_INVALID_PARAM_RET( MBEDTLS_ERR_RSA_BAD_INPUT_DATA,
-                            mbedtls_rsa_rsassa_pss_verify_ext( &ctx, NULL,
+                            mbedtls_rsa_rsassa_pss_verify_ext( &ctx,
                                                                MBEDTLS_RSA_PUBLIC,
                                                                0, sizeof( buf ),
                                                                buf, 0, 0,
                                                                NULL ) );
     TEST_INVALID_PARAM_RET( MBEDTLS_ERR_RSA_BAD_INPUT_DATA,
-                            mbedtls_rsa_rsassa_pss_verify_ext( &ctx, NULL,
+                            mbedtls_rsa_rsassa_pss_verify_ext( &ctx,
                                                                MBEDTLS_RSA_PUBLIC,
                                                                MBEDTLS_MD_SHA1,
                                                                0, NULL,