diff --git a/kern/common-errors.go b/kern/common-errors.go
index 1884898..379baa9 100644
--- a/kern/common-errors.go
+++ b/kern/common-errors.go
@@ -34,7 +34,7 @@ func ErrCantConvert(funcName string, value any, kind string) error {
 }
 
 func ErrExpectedGot(funcName string, kind string, value any) error {
-	return fmt.Errorf("%s(): expected %s, got %s (%v)", funcName, kind, TypeName(value), value)
+	return fmt.Errorf("%s(): expected %s, got %s (%#v)", funcName, kind, TypeName(value), value)
 }
 
 func ErrFuncDivisionByZero(funcName string) error {
@@ -52,7 +52,7 @@ func ErrFuncDivisionByZero(funcName string) error {
 // }
 
 func ErrInvalidParameterValue(funcName, paramName string, paramValue any) error {
-	return fmt.Errorf("%s(): invalid value %s (%v) for parameter %q", funcName, TypeName(paramValue), paramValue, paramName)
+	return fmt.Errorf("%s(): invalid value %s (%#v) for parameter %q", funcName, TypeName(paramValue), paramValue, paramName)
 }
 
 func undefArticle(s string) (article string) {