diff --git a/lib/dim/dim.c b/lib/dim/dim.c
index 97c3d084ebf0..7f3eebae73cb 100644
--- a/lib/dim/dim.c
+++ b/lib/dim/dim.c
@@ -69,11 +69,15 @@ bool dim_calc_stats(const struct dim_sample *start,
 	if (!delta_us)
 		return false;
 
-	curr_stats->ppms = DIV_ROUND_UP(npkts * USEC_PER_MSEC, delta_us);
-	curr_stats->bpms = DIV_ROUND_UP(nbytes * USEC_PER_MSEC, delta_us);
+	/* u32 * USEC_PER_MSEC overflows a 32-bit long */
+	curr_stats->ppms = DIV_ROUND_UP_ULL((u64)npkts * USEC_PER_MSEC,
+					    delta_us);
+	curr_stats->bpms = DIV_ROUND_UP_ULL((u64)nbytes * USEC_PER_MSEC,
+					    delta_us);
 	curr_stats->epms = DIV_ROUND_UP(DIM_NEVENTS * USEC_PER_MSEC,
 					delta_us);
-	curr_stats->cpms = DIV_ROUND_UP(ncomps * USEC_PER_MSEC, delta_us);
+	curr_stats->cpms = DIV_ROUND_UP_ULL((u64)ncomps * USEC_PER_MSEC,
+					    delta_us);
 	if (curr_stats->epms != 0)
 		curr_stats->cpe_ratio = DIV_ROUND_DOWN_ULL(
 			curr_stats->cpms * 100, curr_stats->epms);