diff --git a/src/internal.c b/src/internal.c
index a13e566be..226bf2f27 100644
--- a/src/internal.c
+++ b/src/internal.c
@@ -24044,6 +24044,8 @@ static int DoSessionTicket(WOLFSSL* ssl, const byte* input, word32* inOutIdx,
 
 #endif /* NO_WOLFSSL_CLIENT */
 
+#ifndef NO_CERTS
+
 #ifdef HAVE_PK_CALLBACKS
     int GetPrivateKeySigSize(WOLFSSL* ssl)
     {
@@ -24087,6 +24089,8 @@ static int DoSessionTicket(WOLFSSL* ssl, const byte* input, word32* inOutIdx,
     }
 #endif /* HAVE_PK_CALLBACKS */
 
+#endif /* NO_CERTS */
+
 #ifdef HAVE_ECC
     /* returns the WOLFSSL_* version of the curve from the OID sum */
     word16 GetCurveByOID(int oidSum) {