diff --git a/library/ssl_cache.c b/library/ssl_cache.c
index fe4f30c..456f41c 100644
--- a/library/ssl_cache.c
+++ b/library/ssl_cache.c
@@ -312,7 +312,11 @@
 #endif
 
     if( session_serialized != NULL )
+    {
         mbedtls_platform_zeroize( session_serialized, session_serialized_len );
+        mbedtls_free(session_serialized);
+        session_serialized = NULL;
+    }
 
     return( ret );
 }