diff --git a/srpt/src/ib_srpt.c b/srpt/src/ib_srpt.c
index ae45b269c..3b6a8d374 100644
--- a/srpt/src/ib_srpt.c
+++ b/srpt/src/ib_srpt.c
@@ -2370,6 +2370,8 @@ static unsigned long parse_flags(const char *buf, int count)
 		e = p;
 		while (e < buf + count && !isspace(*e))
 			e++;
+		if (e == p)
+			break;
 		flag = trace_label_to_flag(p, e - p);
 		if (!flag)
 			return 0;