diff --git a/library/ssl_cache.c b/library/ssl_cache.c
index 47107b6..14e350e 100644
--- a/library/ssl_cache.c
+++ b/library/ssl_cache.c
@@ -43,15 +43,6 @@
 #define mbedtls_free       free
 #endif
 
-#include "mbedtls/ssl_cache.h"
-
-#include <string.h>
-
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
-
 void mbedtls_ssl_cache_init( mbedtls_ssl_cache_context *cache )
 {
     memset( cache, 0, sizeof( mbedtls_ssl_cache_context ) );
@@ -330,8 +321,7 @@
 #if defined(MBEDTLS_THREADING_C)
     mbedtls_mutex_free( &cache->mutex );
 #endif
-
-    mbedtls_zeroize( cache, sizeof(mbedtls_ssl_cache_context) );
+    cache->chain = NULL;
 }
 
 #endif /* MBEDTLS_SSL_CACHE_C */