diff --git a/gtests/net/packetdrill/parser.y b/gtests/net/packetdrill/parser.y
index 4f2b04edbb3b422506c037a7e065ae1dfca4f890..1e92d415b0b28ba8df97191ce06f042e58614461 100644
--- a/gtests/net/packetdrill/parser.y
+++ b/gtests/net/packetdrill/parser.y
@@ -984,7 +984,7 @@ sctp_packet_spec
 	                                -1, false, $6, &error);
 	if (inner == NULL) {
 		assert(error != NULL);
-        semantic_error(error);
+		semantic_error(error);
 		free(error);
 	}