diff --git a/lib/pure/nativesockets.nim b/lib/pure/nativesockets.nim
index 5453226a0e..39438a04eb 100644
--- a/lib/pure/nativesockets.nim
+++ b/lib/pure/nativesockets.nim
@@ -214,7 +214,7 @@ proc getProtoByName*(name: string): int {.since: (1, 3, 5).} =
     let protoent = posix.getprotobyname(name.cstring)
 
   if protoent == nil:
-    raise newException(OSError, "protocol not found")
+    raise newException(OSError, "protocol not found: " & name)
 
   result = protoent.p_proto.int