diff --git a/include/polarssl/ssl_ciphersuites.h b/include/polarssl/ssl_ciphersuites.h
index 714cdcd..85392c1 100644
--- a/include/polarssl/ssl_ciphersuites.h
+++ b/include/polarssl/ssl_ciphersuites.h
@@ -27,6 +27,7 @@
 #ifndef POLARSSL_SSL_CIPHERSUITES_H
 #define POLARSSL_SSL_CIPHERSUITES_H
 
+#include "pk.h"
 #include "cipher.h"
 #include "md.h"
 
@@ -197,6 +198,8 @@
 const ssl_ciphersuite_t *ssl_ciphersuite_from_string( const char *ciphersuite_name );
 const ssl_ciphersuite_t *ssl_ciphersuite_from_id( int ciphersuite_id );
 
+pk_type_t ssl_get_ciphersuite_sig_pk_alg( const ssl_ciphersuite_t *info );
+
 #ifdef __cplusplus
 }
 #endif