diff --git a/opm/parser/eclipse/Parser/tests/ParserTests.cpp b/opm/parser/eclipse/Parser/tests/ParserTests.cpp
index 6c5f5aa4a..1886a4634 100644
--- a/opm/parser/eclipse/Parser/tests/ParserTests.cpp
+++ b/opm/parser/eclipse/Parser/tests/ParserTests.cpp
@@ -228,12 +228,12 @@ BOOST_AUTO_TEST_CASE(ReplaceKeyword) {
     ParserPtr parser(new Parser());
     ParserKeywordConstPtr eqldims = parser->getKeyword("EQLDIMS");
 
-    BOOST_CHECK_EQUAL( 5 , eqldims->numItems());
+    BOOST_CHECK_EQUAL( 5u , eqldims->numItems());
     parser->loadKeywordFromFile( "testdata/parser/EQLDIMS2" );
     
 
     eqldims = parser->getKeyword("EQLDIMS");
-    BOOST_CHECK_EQUAL( 1 , eqldims->numItems());
+    BOOST_CHECK_EQUAL( 1u , eqldims->numItems());
 }