diff --git a/configuration/tcp_request_rule.go b/configuration/tcp_request_rule.go
index 183fdb5e..ce326b09 100644
--- a/configuration/tcp_request_rule.go
+++ b/configuration/tcp_request_rule.go
@@ -362,7 +362,7 @@ func ParseTCPRequestRule(f types.TCPType) (rule *models.TCPRequestRule, err erro
 			rule.Cond = a.Cond
 			rule.CondTest = a.CondTest
 		default:
-			return nil, NewConfError(ErrValidationError, fmt.Sprintf("unsupported action '%T' in tcp_request_rule", a))
+			return nil, NewConfError(ErrValidationError, fmt.Sprintf("unsupported action '%s' in tcp_request_rule", a))
 		}
 
 		return rule, nil
@@ -545,7 +545,7 @@ func ParseTCPRequestRule(f types.TCPType) (rule *models.TCPRequestRule, err erro
 			rule.Cond = a.Cond
 			rule.CondTest = a.CondTest
 		default:
-			return nil, NewConfError(ErrValidationError, fmt.Sprintf("unsupported action '%T' in tcp_request_rule", a))
+			return nil, NewConfError(ErrValidationError, fmt.Sprintf("unsupported action '%s' in tcp_request_rule", a))
 		}
 	case *tcp_types.Session:
 		rule = &models.TCPRequestRule{
@@ -631,10 +631,10 @@ func ParseTCPRequestRule(f types.TCPType) (rule *models.TCPRequestRule, err erro
 			rule.Cond = a.Cond
 			rule.CondTest = a.CondTest
 		default:
-			return nil, NewConfError(ErrValidationError, fmt.Sprintf("unsupported action '%T' in tcp_request_rule", a))
+			return nil, NewConfError(ErrValidationError, fmt.Sprintf("unsupported action '%s' in tcp_request_rule", a))
 		}
 	default:
-		return nil, NewConfError(ErrValidationError, fmt.Sprintf("unsupported action '%T' in tcp_request_rule", v))
+		return nil, NewConfError(ErrValidationError, fmt.Sprintf("unsupported action '%s' in tcp_request_rule", v))
 	}
 	return rule, nil
 }
@@ -851,7 +851,7 @@ func SerializeTCPRequestRule(f models.TCPRequestRule) (rule types.TCPType, err e
 				},
 			}, nil
 		}
-		return nil, NewConfError(ErrValidationError, fmt.Sprintf("unsupported action '%T' in tcp_request_rule", f.Action))
+		return nil, NewConfError(ErrValidationError, fmt.Sprintf("unsupported action '%s' in tcp_request_rule", f.Action))
 	case models.TCPRequestRuleTypeContent:
 		switch f.Action {
 		case models.TCPRequestRuleActionAccept:
@@ -1145,7 +1145,7 @@ func SerializeTCPRequestRule(f models.TCPRequestRule) (rule types.TCPType, err e
 				},
 			}, nil
 		}
-		return nil, NewConfError(ErrValidationError, fmt.Sprintf("unsupported action '%T' in tcp_request_rule", f.Action))
+		return nil, NewConfError(ErrValidationError, fmt.Sprintf("unsupported action '%s' in tcp_request_rule", f.Action))
 	case models.TCPRequestRuleTypeSession:
 		switch f.Action {
 		case models.TCPRequestRuleActionAccept:
@@ -1311,14 +1311,14 @@ func SerializeTCPRequestRule(f models.TCPRequestRule) (rule types.TCPType, err e
 				},
 			}, nil
 		}
-		return nil, NewConfError(ErrValidationError, fmt.Sprintf("unsupported action '%T' in tcp_request_rule", f.Action))
+		return nil, NewConfError(ErrValidationError, fmt.Sprintf("unsupported action '%s' in tcp_request_rule", f.Action))
 	case models.TCPRequestRuleTypeInspectDashDelay:
 		if f.Timeout == nil {
-			return nil, NewConfError(ErrValidationError, fmt.Sprintf("unsupported action '%T' in tcp_request_rule", f.Type))
+			return nil, NewConfError(ErrValidationError, fmt.Sprintf("unsupported action '%s' in tcp_request_rule", f.Type))
 		}
 		return &tcp_types.InspectDelay{
 			Timeout: strconv.FormatInt(*f.Timeout, 10),
 		}, nil
 	}
-	return nil, NewConfError(ErrValidationError, fmt.Sprintf("unsupported action '%T' in tcp_request_rule", f.Type))
+	return nil, NewConfError(ErrValidationError, fmt.Sprintf("unsupported action '%s' in tcp_request_rule", f.Type))
 }