diff --git a/tests/kernel/mem_protect/userspace/src/main.c b/tests/kernel/mem_protect/userspace/src/main.c
index e0c12487072..14222988ba1 100644
--- a/tests/kernel/mem_protect/userspace/src/main.c
+++ b/tests/kernel/mem_protect/userspace/src/main.c
@@ -1012,16 +1012,18 @@ void test_main(void)
 
 #if defined(CONFIG_ARM64)
 	struct z_arm64_thread_stack_header *hdr;
+	void *vhdr = ((struct z_arm64_thread_stack_header *)ztest_thread_stack);
 
-	hdr = ((struct z_arm64_thread_stack_header *)ztest_thread_stack);
+	hdr = vhdr;
 	priv_stack_ptr = (((char *)&hdr->privilege_stack) +
 			  (sizeof(hdr->privilege_stack) - 1));
 #elif defined(CONFIG_ARM)
 	priv_stack_ptr = (char *)z_priv_stack_find(ztest_thread_stack);
 #elif defined(CONFIG_X86)
 	struct z_x86_thread_stack_header *hdr;
+	void *vhdr = ((struct z_x86_thread_stack_header *)ztest_thread_stack);
 
-	hdr = ((struct z_x86_thread_stack_header *)ztest_thread_stack);
+	hdr = vhdr;
 	priv_stack_ptr = (((char *)&hdr->privilege_stack) +
 			  (sizeof(hdr->privilege_stack) - 1));
 #elif defined(CONFIG_RISCV)