diff --git a/src/protocol.cpp b/src/protocol.cpp
index 54ad62b1a2..87d6e06848 100644
--- a/src/protocol.cpp
+++ b/src/protocol.cpp
@@ -181,7 +181,11 @@ std::string CInv::GetCommand() const
 
 std::string CInv::ToString() const
 {
-    return strprintf("%s %s", GetCommand(), hash.ToString());
+    try {
+        return strprintf("%s %s", GetCommand(), hash.ToString());
+    } catch(const std::out_of_range &) {
+        return strprintf("0x%08x %s", type, hash.ToString());
+    }
 }
 
 const std::vector<std::string> &getAllNetMessageTypes()