diff --git a/src/Unittests/unittests_vdpm.cc b/src/Unittests/unittests_vdpm.cc
index ded687e7..46a8110d 100644
--- a/src/Unittests/unittests_vdpm.cc
+++ b/src/Unittests/unittests_vdpm.cc
@@ -260,10 +260,10 @@ TEST_F(OpenMeshVDPM, WriteReadPM)
     EXPECT_TRUE(decimater.module(hModProg).write(filename)) << "Could not write PM file.";
 
     LoadInfo info = open_progresult_mesh(filename);
-    EXPECT_EQ(7526, info.mesh.n_vertices()) << "Vertices differ";
-    EXPECT_EQ(6, info.mesh.n_edges()) << "Edges differ";
-    EXPECT_EQ(4, info.mesh.n_faces()) << "Faces differ";
-    EXPECT_EQ(7522, info.n_details) << "Details differ";
+    EXPECT_EQ(7526u, info.mesh.n_vertices()) << "Vertices differ";
+    EXPECT_EQ(6u, info.mesh.n_edges()) << "Edges differ";
+    EXPECT_EQ(4u, info.mesh.n_faces()) << "Faces differ";
+    EXPECT_EQ(7522u, info.n_details) << "Details differ";
 
     remove(filename.c_str());
 }