diff --git a/tests/cputest/tests/struct.c b/tests/cputest/tests/struct.c
index b165bc15..8f1acb78 100644
--- a/tests/cputest/tests/struct.c
+++ b/tests/cputest/tests/struct.c
@@ -1,6 +1,6 @@
 #include "trap.h"
 
-#define N 100
+#define N 40
 
 struct dummy {
 	int pad1[N];