diff --git a/test/net/TestIPv4Address.cxx b/test/net/TestIPv4Address.cxx
index 08b995855..aa7f727be 100644
--- a/test/net/TestIPv4Address.cxx
+++ b/test/net/TestIPv4Address.cxx
@@ -85,6 +85,6 @@ TEST(IPv4Address, MaskFromPrefix)
 
 TEST(IPv4Address, Numeric)
 {
-	EXPECT_EQ(IPv4Address(1, 2, 3, 4, 0).GetNumericAddress(), 0x01020304);
+	EXPECT_EQ(IPv4Address(1, 2, 3, 4, 0).GetNumericAddress(), 0x01020304u);
 	EXPECT_EQ(IPv4Address(1, 2, 3, 4, 0).GetNumericAddressBE(), htonl(0x01020304));
 }