Index: src/tests/preempt_longrun/stack.c
===================================================================
--- src/tests/preempt_longrun/stack.c	(revision 8b28a52140b803f5b4a09f741c50bedd4ee63791)
+++ src/tests/preempt_longrun/stack.c	(revision 3eab0ef68502ef937f336ff8b65b6a8bb006b8bf)
@@ -15,8 +15,8 @@
 
 void main(worker_t * this) {
-	volatile long p = 5_021_609ul;
-	volatile long a = 326_417ul;
-	volatile long n = 1l;
-	for (volatile long i = 0; i < p; i++) {
+	volatile long long p = 5_021_609ul;
+	volatile long long a = 326_417ul;
+	volatile long long n = 1l;
+	for (volatile long long i = 0; i < p; i++) {
 		n *= a;
 		n %= p;