diff --git a/include/mbedtls/ssl_ciphersuites.h b/include/mbedtls/ssl_ciphersuites.h
index 8e7b794..931c1b3 100644
--- a/include/mbedtls/ssl_ciphersuites.h
+++ b/include/mbedtls/ssl_ciphersuites.h
@@ -356,6 +356,7 @@
 
 #if defined(MBEDTLS_PK_C)
 mbedtls_pk_type_t mbedtls_ssl_get_ciphersuite_sig_pk_alg( const mbedtls_ssl_ciphersuite_t *info );
+mbedtls_pk_type_t mbedtls_ssl_get_ciphersuite_sig_alg( const mbedtls_ssl_ciphersuite_t *info );
 #endif
 
 #if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C)