diff --git a/tests/kernel/fatal/src/main.c b/tests/kernel/fatal/src/main.c
index d32463e350d..e54a564b2e2 100644
--- a/tests/kernel/fatal/src/main.c
+++ b/tests/kernel/fatal/src/main.c
@@ -63,7 +63,7 @@ void alt_thread1(void)
 	 * and xtensa
 	 */
 	{
-		int illegal = 0;
+		long illegal = 0;
 		((void(*)(void))&illegal)();
 	}
 #endif