diff --git a/test/src/xdmfwritertest.cpp b/test/src/xdmfwritertest.cpp
index 57e5c7d..e680a39 100644
--- a/test/src/xdmfwritertest.cpp
+++ b/test/src/xdmfwritertest.cpp
@@ -225,8 +225,9 @@ int main(int argc, char* argv[])
 			type,
 			args.getAdditionalArgument<const char*>("filename"),
 			start);
+			std::string extraIntVarName = "";
 
-	writer.init(cellVariables, vertexVariables,
+	writer.init(cellVariables, vertexVariables, extraIntVarName.c_str(),
 		!args.isSet("no-vertex-filter"), !args.isSet("no-partition"));
 
 	unsigned int numCells;