1 files changed, 6 insertions, 0 deletions

diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-event-parse.c
index fde1a434d630..2d424ff50ec2 100644
--- a/tools/perf/util/trace-event-parse.c
+++ b/tools/perf/util/trace-event-parse.c
@@ -2106,6 +2106,12 @@ static unsigned long long eval_num_arg(void *data, int size,
                                 die("unknown op '%s'", arg->op.op);
                         val = left == right;
                         break;
+                case '-':
+                        val = left - right;
+                        break;
+                case '+':
+                        val = left + right;
+                        break;
                 default:
                         die("unknown op '%s'", arg->op.op);
                 }