diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index 05eb6b40b16a37fef1e5f4b4ca67fb668fb45232..337ca02fb52552f6e646e90d2b8d441fe15db1af 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -3489,6 +3489,7 @@ process_defined_func(struct trace_seq *s, void *data, int size,
 			if (!string->str)
 				die("malloc str");
 
+			args[i] = (unsigned long long)string->str;
 			strings = string;
 			trace_seq_destroy(&str);
 			break;