diff --git a/ccl/rslang/src/TypeAuditor.cpp b/ccl/rslang/src/TypeAuditor.cpp
index e5e6b73..63b5f7c 100644
--- a/ccl/rslang/src/TypeAuditor.cpp
+++ b/ccl/rslang/src/TypeAuditor.cpp
@@ -7,8 +7,8 @@ namespace {
 // Helper functions
 [[nodiscard]] std::string ToString(const ExpressionType& type) noexcept(false);
 [[nodiscard]] constexpr bool IsSubset(TokenID token) noexcept;
-[[nodiscard]] bool IsEchelon(SyntaxTree::Cursor iter);
-[[nodiscard]] bool IsEchelon(SyntaxTree::Cursor iter, Index index);
+[[nodiscard]] bool IsStructureDomain(SyntaxTree::Cursor iter);
+[[nodiscard]] bool IsStructureDomain(SyntaxTree::Cursor iter, Index index);
 void MangleRadicals(const std::string& funcName, Typification& type);
 
 std::string ToString(const ExpressionType& type) noexcept(false) {
@@ -26,7 +26,7 @@ constexpr bool IsSubset(const TokenID token) noexcept {
     || token == TokenID::NOTSUBSET;
 }
 
-bool IsEchelon(SyntaxTree::Cursor iter) {
+bool IsStructureDomain(SyntaxTree::Cursor iter) {
   switch (iter->id) {
   default: return false;
 
@@ -34,19 +34,20 @@ bool IsEchelon(SyntaxTree::Cursor iter) {
   case TokenID::ID_GLOBAL:
   case TokenID::BOOLEAN:
   case TokenID::DECART:
+  case TokenID::NT_ENUMERATION:
     break;
   }
   for (Index i = 0; i < iter.ChildrenCount(); ++i) {
-    if (!IsEchelon(iter, i)) {
+    if (!IsStructureDomain(iter, i)) {
       return false;
     }
   }
   return true;
 }
 
-bool IsEchelon(SyntaxTree::Cursor iter, const Index index) {
+bool IsStructureDomain(SyntaxTree::Cursor iter, const Index index) {
   iter.MoveToChild(index);
-  return IsEchelon(iter);
+  return IsStructureDomain(iter);
 }
 
 bool IsRadical(const std::string& alias) {
@@ -304,7 +305,7 @@ void TypeAuditor::Clear() noexcept {
 bool TypeAuditor::ViGlobalDeclaration(Cursor iter) {
   const auto childrenCount = iter.ChildrenCount();
   if (iter->id == TokenID::PUNC_STRUCT) {
-    if (childrenCount != 2 || !IsEchelon(iter, 1)) {
+    if (childrenCount != 2 || !IsStructureDomain(iter, 1)) {
       OnError(SemanticEID::globalStructure, iter(0).pos.finish);
       return false;
     }
diff --git a/ccl/rslang/test/src/testTypeAuditor.cpp b/ccl/rslang/test/src/testTypeAuditor.cpp
index 8eb26fa..b3d4c4b 100644
--- a/ccl/rslang/test/src/testTypeAuditor.cpp
+++ b/ccl/rslang/test/src/testTypeAuditor.cpp
@@ -103,6 +103,7 @@ TEST_F(UTTypeAuditor, DefinitionsCorrect) {
 
   ExpectTypification(R"(S1 \deftype X1)", "X1"_t);
   ExpectTypification(R"(S1 \deftype Z)", "Z"_t);
+  ExpectTypification(R"(S1 \deftype {X1, X1})", "B(X1)"_t);
   ExpectTypification(R"(S1 \deftype X1*X1)", "X1*X1"_t);
 
   ExpectTypification(R"(F42 \defexpr [a \in X1] {a})", "B(X1)"_t);
@@ -126,6 +127,7 @@ TEST_F(UTTypeAuditor, DefinitionsCorrect) {
 
 TEST_F(UTTypeAuditor, DefinitionsErrors) {
   ExpectError(R"(S1 \deftype R1)", SemanticEID::globalStructure);
+  ExpectError(R"(S1 \deftype {})", SemanticEID::globalStructure);
   ExpectError(R"(S1 \deftype 1)", SemanticEID::globalStructure);
   ExpectError(R"(S1 \deftype 1 \eq 1)", SemanticEID::globalStructure);
   ExpectError(R"(S1 \deftype [a \in X1] a \eq a)", SemanticEID::globalStructure);
diff --git a/pyconcept/CHANGELOG.md b/pyconcept/CHANGELOG.md
index cb59c82..2c0b721 100644
--- a/pyconcept/CHANGELOG.md
+++ b/pyconcept/CHANGELOG.md
@@ -19,6 +19,12 @@ Here we write upgrading notes. Make them as straightforward as possible.
 
 ### Fixed
 
+## [0.1.11] - 2024-10-17
+
+- Allow enumeration in structure definition
+
+### Changed
+
 ## [0.1.10] - 2024-09-25
 
 ### Fixed
diff --git a/pyconcept/VERSION b/pyconcept/VERSION
index 345f8cc..a34eaa5 100644
--- a/pyconcept/VERSION
+++ b/pyconcept/VERSION
@@ -1 +1 @@
-0.1.10
\ No newline at end of file
+0.1.11
\ No newline at end of file