diff --git a/criu/aio.c b/criu/aio.c
index 27c251df5..45651f2d3 100644
--- a/criu/aio.c
+++ b/criu/aio.c
@@ -13,7 +13,7 @@
 #include "images/mm.pb-c.h"
 #include <compel/compel.h>
 
-#define NR_IOEVENTS_IN_NPAGES(npages) ((PAGE_SIZE * npages - sizeof(struct aio_ring)) / sizeof(struct io_event))
+#define NR_IOEVENTS_IN_NPAGES(npages) ((PAGE_SIZE * (npages) - sizeof(struct aio_ring)) / sizeof(struct io_event))
 
 int dump_aio_ring(MmEntry *mme, struct vma_area *vma)
 {