diff --git a/cli.cpp b/cli.cpp
index e5b79b099fe8739bd0b8cdf85ec22f1a5ee7f0f8..7cd95d0f76e4d73b2ad958fb24f3ae1af02c4582 100644
--- a/cli.cpp
+++ b/cli.cpp
@@ -273,7 +273,7 @@ void Cli::loop (Stream& input)
             {
                 syringe.set_internal_diameter_mm("cli", atof(_temp.c_str()));
                 syringe.save_json();
-                answer( syringe.check_configuration("cli"), F("invalid diameter"));
+                answer( syringe_filled.check_configuration(), F("invalid diameter"));
             }
             Serial.printf("%sDIA: %g mm\n", _msgHeader, syringe.get_internal_diameter_mm("cli"));
         }