diff --git a/lib/irs/getnameinfo.c b/lib/irs/getnameinfo.c
index c5f987dd75..6e26e278fd 100644
--- a/lib/irs/getnameinfo.c
+++ b/lib/irs/getnameinfo.c
@@ -319,8 +319,13 @@ getnameinfo(const struct sockaddr *sa, IRS_GETNAMEINFO_SOCKLEN_T salen,
 		case DNS_R_NOVALIDKEY:
 		case DNS_R_NOVALIDDS:
 		case DNS_R_NOVALIDSIG:
-			ERR(EAI_INSECUREDATA);
-			/* NOTREACHED */
+			/*
+			 * Don't use ERR as GCC 7 wants to raise a
+			 * warning with ERR about possible falling
+			 * through which is impossible.
+			 */
+			result = EAI_INSECUREDATA;
+			goto cleanup;
 		default:
 			ERR(EAI_FAIL);
 		}