diff --git a/tools/regression/lib/libc/resolv/resolv.c b/tools/regression/lib/libc/resolv/resolv.c
index 93928721eae1..2ec3eebd85da 100644
--- a/tools/regression/lib/libc/resolv/resolv.c
+++ b/tools/regression/lib/libc/resolv/resolv.c
@@ -87,13 +87,14 @@ load(const char *fname)
 	if ((fp = fopen(fname, "r")) == NULL)
 		err(1, "Cannot open `%s'", fname);
 	while ((line = fgetln(fp, &len)) != NULL) {
-		if (line[0] == '#')
-			continue;
 		char c = line[len];
 		char *ptr;
 		line[len] = '\0';
-		for (ptr = strtok(line, WS); ptr; ptr = strtok(NULL, WS))
+		for (ptr = strtok(line, WS); ptr; ptr = strtok(NULL, WS)) {
+			if (ptr == '\0' || ptr[0] == '#')
+				continue;
 			sl_add(hosts, strdup(ptr));
+		}
 		line[len] = c;
 	}