diff --git a/src/intel/perf/gen_perf.c b/src/intel/perf/gen_perf.c
index 23a5465e195..795aa88bf89 100644
--- a/src/intel/perf/gen_perf.c
+++ b/src/intel/perf/gen_perf.c
@@ -1144,8 +1144,12 @@ gen_perf_query_result_read_perfcnts(struct gen_perf_query_result *result,
                                     const uint64_t *end)
 {
    for (uint32_t i = 0; i < 2; i++) {
-      result->accumulator[query->perfcnt_offset + i] =
-         (end[i] & PERF_CNT_VALUE_MASK) - (start[i] & PERF_CNT_VALUE_MASK);
+      uint64_t v0 = start[i] & PERF_CNT_VALUE_MASK;
+      uint64_t v1 = end[i] & PERF_CNT_VALUE_MASK;
+
+      result->accumulator[query->perfcnt_offset + i] = v0 > v1 ?
+         (PERF_CNT_VALUE_MASK + 1 + v1 - v0) :
+         (v1 - v0);
    }
 }