diff --git a/tests/testActivePair.c b/tests/testActivePair.c
index 61f6c03fb339647532049be7a602a44443e182b4..3d4320d595019abfb6f9873972f8cd8d2677e4b8 100644
--- a/tests/testActivePair.c
+++ b/tests/testActivePair.c
@@ -460,7 +460,7 @@ int main(int argc, char *argv[]) {
   engine.ti_current = 8;
   engine.max_active_bin = num_time_bins;
 
-  if (posix_memalign((void **)&runner, part_align, sizeof(struct runner)) !=
+  if (posix_memalign((void **)&runner, SWIFT_STRUCT_ALIGNMENT, sizeof(struct runner)) !=
       0) {
     error("couldn't allocate runner");
   }