diff --git a/Chapter06/tinylang/lib/CodeGen/CGModule.cpp b/Chapter06/tinylang/lib/CodeGen/CGModule.cpp
index 4ea5561..496b80c 100644
--- a/Chapter06/tinylang/lib/CodeGen/CGModule.cpp
+++ b/Chapter06/tinylang/lib/CodeGen/CGModule.cpp
@@ -41,6 +41,9 @@ llvm::Type *CGModule::convertType(TypeDeclaration *Ty) {
     llvm::Type *Component = convertType(ArrayTy->getType());
     Expr *Nums = ArrayTy->getNums();
     uint64_t NumElements = 5; // TODO Eval Nums
+    if(auto *intergerExpr = llvm::dyn_cast<IntegerLiteral>(Nums)){
+        NumElements = intergerExpr->getValue().getExtValue();
+    }
     llvm::Type *T =
         llvm::ArrayType::get(Component, NumElements);
     return TypeCache[Ty] = T;
diff --git a/Chapter07/tinylang/lib/CodeGen/CGModule.cpp b/Chapter07/tinylang/lib/CodeGen/CGModule.cpp
index 9963d2c..f2f2673 100644
--- a/Chapter07/tinylang/lib/CodeGen/CGModule.cpp
+++ b/Chapter07/tinylang/lib/CodeGen/CGModule.cpp
@@ -43,6 +43,9 @@ llvm::Type *CGModule::convertType(TypeDeclaration *Ty) {
     llvm::Type *Component = convertType(ArrayTy->getType());
     Expr *Nums = ArrayTy->getNums();
     uint64_t NumElements = 5; // TODO Eval Nums
+    if(auto *intergerExpr = llvm::dyn_cast<IntegerLiteral>(Nums)){
+        NumElements = intergerExpr->getValue().getExtValue();
+    }
     llvm::Type *T =
         llvm::ArrayType::get(Component, NumElements);
     return TypeCache[Ty] = T;
diff --git a/Chapter08/tinylang/lib/CodeGen/CGModule.cpp b/Chapter08/tinylang/lib/CodeGen/CGModule.cpp
index 9963d2c..f2f2673 100644
--- a/Chapter08/tinylang/lib/CodeGen/CGModule.cpp
+++ b/Chapter08/tinylang/lib/CodeGen/CGModule.cpp
@@ -43,6 +43,9 @@ llvm::Type *CGModule::convertType(TypeDeclaration *Ty) {
     llvm::Type *Component = convertType(ArrayTy->getType());
     Expr *Nums = ArrayTy->getNums();
     uint64_t NumElements = 5; // TODO Eval Nums
+    if(auto *intergerExpr = llvm::dyn_cast<IntegerLiteral>(Nums)){
+        NumElements = intergerExpr->getValue().getExtValue();
+    }
     llvm::Type *T =
         llvm::ArrayType::get(Component, NumElements);
     return TypeCache[Ty] = T;