diff --git a/spdy/core/spdy_simple_arena_test.cc b/spdy/core/spdy_simple_arena_test.cc
index b0da896..35c84f1 100644
--- a/spdy/core/spdy_simple_arena_test.cc
+++ b/spdy/core/spdy_simple_arena_test.cc
@@ -18,7 +18,7 @@
 
 TEST(SpdySimpleArenaTest, NoAllocationOnConstruction) {
   SpdySimpleArena arena(kDefaultBlockSize);
-  EXPECT_EQ(0, arena.status().bytes_allocated());
+  EXPECT_EQ(0u, arena.status().bytes_allocated());
 }
 
 TEST(SpdySimpleArenaTest, Memdup) {