diff --git a/src/libslic3r/Config.cpp b/src/libslic3r/Config.cpp
index e0c639fdf..f93d98e1b 100644
--- a/src/libslic3r/Config.cpp
+++ b/src/libslic3r/Config.cpp
@@ -506,6 +506,16 @@ void ConfigBase::set_deserialize(std::initializer_list<SetDeserializeItem> items
 		this->set_deserialize(item.opt_key, item.opt_value, substitutions_ctxt, item.append);
 }
 
+static inline bool looks_like_enum_value(const std::string &s)
+{
+	if (value.empty() || value.size() > 64 || ! isalpha(value.front()))
+		return false;
+	for (const char c : s)
+		if (! (isalnum(c) || c == '_' || c == '-'))
+			return false;
+	return true;
+}
+
 bool ConfigBase::set_deserialize_raw(const t_config_option_key &opt_key_src, const std::string &value, ConfigSubstitutionContext& substitutions_ctxt, bool append)
 {
     t_config_option_key    opt_key = opt_key_src;
@@ -551,7 +561,10 @@ bool ConfigBase::set_deserialize_raw(const t_config_option_key &opt_key_src, con
         // Deserialize failed, try to substitute with a default value.
         assert(substitutions_ctxt.rule == ForwardCompatibilitySubstitutionRule::Enable || substitutions_ctxt.rule == ForwardCompatibilitySubstitutionRule::EnableSilent);
 
-        opt->set(optdef->default_value.get());
+        if (optdef->type == coBool && looks_like_enum_value(value))
+            static_cast<ConfigOptionBool*>(opt)->value = boost::iequals(value, "enabled") || boost::iequals(value, "on");
+        else
+            opt->set(optdef->default_value.get());
 
         if (substitutions_ctxt.rule == ForwardCompatibilitySubstitutionRule::Enable ||
             substitutions_ctxt.rule == ForwardCompatibilitySubstitutionRule::EnableSystemSilent) {
diff --git a/src/libslic3r/Config.hpp b/src/libslic3r/Config.hpp
index 078e94cfb..088eec33a 100644
--- a/src/libslic3r/Config.hpp
+++ b/src/libslic3r/Config.hpp
@@ -1330,11 +1330,11 @@ public:
     bool deserialize(const std::string &str, bool append = false) override
     {
         UNUSED(append);
-        if (str == "1" || boost::iequals(str, "enabled") || boost::iequals(str, "on")) {
+        if (str == "1") {
             this->value = true;
             return true;
         }
-        if (str == "0" || boost::iequals(str, "disabled") || boost::iequals(str, "off")) {
+        if (str == "0") {
             this->value = false;
             return true;
         }