--- a/trace-util.c
+++ b/trace-util.c
@@ -110,7 +110,7 @@ void parse_cmdlines(struct pevent *peven
 
 	line = strtok_r(file, "\n", &next);
 	while (line) {
-		sscanf(line, "%d %as", &pid,
+		sscanf(line, "%d %ms", &pid,
 		       (float *)(void *)&comm); /* workaround gcc warning */
 		pevent_register_comm(pevent, comm, pid);
 		free(comm);
@@ -133,7 +133,7 @@ void parse_proc_kallsyms(struct pevent *
 	line = strtok_r(file, "\n", &next);
 	while (line) {
 		mod = NULL;
-		ret = sscanf(line, "%as %c %as\t[%as",
+		ret = sscanf(line, "%ms %c %ms\t[%ms",
 			     (float *)(void *)&addr_str, /* workaround gcc warning */
 			     &ch,
 			     (float *)(void *)&func,
