diff --git a/contrib/dma/spool.c b/contrib/dma/spool.c
index 416b5fa8f0ee..2864909cf6a6 100644
--- a/contrib/dma/spool.c
+++ b/contrib/dma/spool.c
@@ -415,7 +415,7 @@ flushqueue_since(unsigned int period)
 		return (0);
 
 	/* Did the flush file get touched within the last period seconds? */
-	if (st.st_mtim.tv_sec + period >= now.tv_sec)
+	if (st.st_mtim.tv_sec + (int)period >= now.tv_sec)
 		return (1);
 	else
 		return (0);