diff --git a/cliutils/config.nim b/cliutils/config.nim
index fe25b09..0c0a660 100644
--- a/cliutils/config.nim
+++ b/cliutils/config.nim
@@ -95,7 +95,7 @@ proc getJson*(
     elif cfg.json.hasKey(jsonKey): return cfg.json[jsonKey]
     else: raise newException(ValueError, "cannot find a configuration value for \"" & key & "\"")
   except Exception:
-    raise newException(ValueError, "cannot parse value as JSON:" & getCurrentExceptionMsg())
+    raise newException(ValueError, "cannot parse [" & getVal(cfg, key) & "] as JSON:" & getCurrentExceptionMsg())
 
 proc getJson*(
     cfg: CombinedConfig,