diff --git a/zephyr/samples/wolfssl_benchmark/prj.conf b/zephyr/samples/wolfssl_benchmark/prj.conf
index 15d4ebba3..b7e4eee43 100644
--- a/zephyr/samples/wolfssl_benchmark/prj.conf
+++ b/zephyr/samples/wolfssl_benchmark/prj.conf
@@ -1,5 +1,6 @@
 # Configure stack and heap sizes
 CONFIG_MAIN_STACK_SIZE=32768
+CONFIG_COMMON_LIBC_MALLOC_ARENA_SIZE=8192
 
 # Pthreads
 CONFIG_PTHREAD_IPC=y