diff --git a/cuburn/code/mwc.py b/cuburn/code/mwc.py
index 6234b56..d5ec00e 100644
--- a/cuburn/code/mwc.py
+++ b/cuburn/code/mwc.py
@@ -72,7 +72,7 @@ class MWCTest(HunkOCode):
 __global__ void test_mwc(mwc_st *msts, uint64_t *sums, float nrounds) {
     mwc_st rctx = msts[gtid()];
     uint64_t sum = 0;
-    for (float i = 0; i < nrounds; i++) sum += mwc_next(&rctx);
+    for (float i = 0; i < nrounds; i++) sum += mwc_next(rctx);
     sums[gtid()] = sum;
     msts[gtid()] = rctx;
 }