diff --git a/library/ssl_ticket.c b/library/ssl_ticket.c
index 285e736..b5cd901 100644
--- a/library/ssl_ticket.c
+++ b/library/ssl_ticket.c
@@ -259,7 +259,7 @@
     unsigned char i;
 
     for( i = 0; i < sizeof( ctx->keys ) / sizeof( *ctx->keys ); i++ )
-        if( memcmp( name, ctx->keys[i].name, 4 ) == 0 )
+        if( mbedtls_platform_memcmp( name, ctx->keys[i].name, 4 ) == 0 )
             return( &ctx->keys[i] );
 
     return( NULL );