diff --git a/programs/bpf/c/src/ser/ser.c b/programs/bpf/c/src/ser/ser.c
index 50900fbaf098e3..4d09f9409dbee7 100644
--- a/programs/bpf/c/src/ser/ser.c
+++ b/programs/bpf/c/src/ser/ser.c
@@ -5,7 +5,7 @@
 #include <solana_sdk.h>
 
 extern uint64_t entrypoint(const uint8_t *input) {
-  SolAccountInfo ka[1];
+  SolAccountInfo ka[2];
   SolParameters params = (SolParameters){.ka = ka};
 
   sol_log(__FILE__);
@@ -16,6 +16,8 @@ extern uint64_t entrypoint(const uint8_t *input) {
 
   char ka_data[] = {1, 2, 3};
   SolPubkey ka_owner;
+  sol_memset(ka_owner.x, 0, SIZE_PUBKEY); // set to system program
+
   sol_assert(params.ka_num == 2);
   for (int i = 0; i < 2; i++) {
     sol_assert(*params.ka[i].lamports == 42);