diff --git a/ets2panda/linter/src/lib/TypeScriptLinter.ts b/ets2panda/linter/src/lib/TypeScriptLinter.ts
index e58892c5304b12d882aa65c1a7e5728daf368fb5..7b3b0ffe0d5e2b7f7089c2e62b4d86b2dc4a6af1 100644
--- a/ets2panda/linter/src/lib/TypeScriptLinter.ts
+++ b/ets2panda/linter/src/lib/TypeScriptLinter.ts
@@ -11554,24 +11554,7 @@ export class TypeScriptLinter extends BaseTypeScriptLinter {
       instanceProps: new Map<string, ts.Type>()
     };
 
-    classDecl.members.forEach((member) => {
-      if (!ts.isPropertyDeclaration(member)) {
-        return;
-      }
-
-      const propName = member.name.getText();
-      const propType = this.tsTypeChecker.getTypeAtLocation(member);
-      const isStatic = member.modifiers?.some((m) => {
-        return m.kind === ts.SyntaxKind.StaticKeyword;
-      });
-
-      if (isStatic) {
-        result.staticProps.set(propName, propType);
-      } else {
-        result.instanceProps.set(propName, propType);
-      }
-    });
-
+    this.tsUtils.collectPropertiesFromClass(classDecl, result);
     return result;
   }
 
diff --git a/ets2panda/linter/src/lib/utils/TsUtils.ts b/ets2panda/linter/src/lib/utils/TsUtils.ts
index 738928269d0a778b945d0e0c0b9c49f2cf55b3c8..c7417e2425fac193338fead6af9f50d3c421d8f0 100644
--- a/ets2panda/linter/src/lib/utils/TsUtils.ts
+++ b/ets2panda/linter/src/lib/utils/TsUtils.ts
@@ -3816,4 +3816,55 @@ export class TsUtils {
 
     return false;
   }
+
+  collectPropertiesFromClass(
+    classDecl: ts.ClassDeclaration,
+    result: {
+      staticProps: Map<string, ts.Type>;
+      instanceProps: Map<string, ts.Type>;
+    },
+    isBase: boolean = false
+  ): void {
+    classDecl.members.forEach((member) => {
+      if (!ts.isPropertyDeclaration(member) || !member.name || !ts.isIdentifier(member.name)) {
+        return;
+      }
+
+      const propName = member.name.text;
+
+      const isPrivate = member.modifiers?.some((m) => {
+        return m.kind === ts.SyntaxKind.PrivateKeyword;
+      });
+      if (isBase && isPrivate) {
+        return;
+      }
+
+      const propType = this.tsTypeChecker.getTypeAtLocation(member);
+      const isStatic = member.modifiers?.some((m) => {
+        return m.kind === ts.SyntaxKind.StaticKeyword;
+      });
+
+      if (isStatic) {
+        result.staticProps.set(propName, propType);
+      } else {
+        result.instanceProps.set(propName, propType);
+      }
+    });
+
+    const heritage = classDecl.heritageClauses?.find((h) => {
+      return h.token === ts.SyntaxKind.ExtendsKeyword;
+    });
+    if (heritage) {
+      const baseTypeNode = heritage?.types[0];
+      if (baseTypeNode) {
+        const baseType = this.tsTypeChecker.getTypeAtLocation(baseTypeNode);
+        const baseSymbol = baseType.getSymbol();
+        const declarations = baseSymbol?.getDeclarations();
+        const baseClassDecl = declarations?.find(ts.isClassDeclaration);
+        if (baseClassDecl) {
+          this.collectPropertiesFromClass(baseClassDecl, result, true);
+        }
+      }
+    }
+  }
 }
diff --git a/ets2panda/linter/test/main/no_ts_like_smart_type.ets b/ets2panda/linter/test/main/no_ts_like_smart_type.ets
index 7cdff3d524a3211820c8e0ecad1fe4f5692292f3..1c858dc1e1aac2057224f507ae790b707a338f32 100755
--- a/ets2panda/linter/test/main/no_ts_like_smart_type.ets
+++ b/ets2panda/linter/test/main/no_ts_like_smart_type.ets
@@ -193,4 +193,42 @@ class A {
             return this.b //error
         }
     }
+}
+
+export class K {
+    _t:string
+    constructor(t:string) {
+        this._t = t;
+    }
+}
+
+export class P extends K {
+    constructor(t:string){
+        super(t)
+    }
+    toString(): string {
+        return this._t // legal
+    }
+}
+
+export class H {
+  protected _t:string
+  constructor(t:string) {
+      this._t = t;
+  }
+}
+
+export class T extends H {
+    constructor(t:string) {
+      super(t)
+    }
+}
+
+export class N extends T {
+    constructor(t:string){
+        super(t)
+    }
+    toString(): string {
+        return this._t // legal
+    }
 }
\ No newline at end of file