diff --git a/src/lib/dns/master_loader.cc b/src/lib/dns/master_loader.cc
index 4444afa377..e9aad9267a 100644
--- a/src/lib/dns/master_loader.cc
+++ b/src/lib/dns/master_loader.cc
@@ -41,7 +41,11 @@ public:
         add_callback_(add_callback),
         options_(options)
     {
-        lexer_.pushSource(master_file);
+        string errors;
+        if (!lexer_.pushSource(master_file, &errors)) {
+            // TODO: Handle somehow.
+            assert(0);
+        }
     }
 
     // Get a string token. Handle it as error if it is not string.
diff --git a/src/lib/dns/tests/master_loader_unittest.cc b/src/lib/dns/tests/master_loader_unittest.cc
index 688410ba7b..d0a3339366 100644
--- a/src/lib/dns/tests/master_loader_unittest.cc
+++ b/src/lib/dns/tests/master_loader_unittest.cc
@@ -62,7 +62,7 @@ public:
     void setLoader(const char* file, const Name& origin, const RRClass rrclass,
                    const MasterLoader::Options options)
     {
-        loader_.reset(new MasterLoader((string(TEST_DATA_SRCDIR) +
+        loader_.reset(new MasterLoader((string(TEST_DATA_SRCDIR "/") +
                                         file).c_str(), origin, rrclass,
                                        callbacks_,
                                        boost::bind(&MasterLoaderTest::addRRset,
@@ -104,6 +104,6 @@ TEST_F(MasterLoaderTest, basicLoad) {
 
     checkRR("example.org", RRType::SOA(), "ns1.example.org. admin.example.org. "
             "1234 3600 1800 2419200 7200");
-    checkRR("example.org", RRType::NS(), "ns1.example.org");
+    checkRR("example.org", RRType::NS(), "ns1.example.org.");
     checkRR("www.example.org", RRType::A(), "192.0.2.1");
 }