diff --git a/src/engine/analyzer/python/common/python-analyzer.ts b/src/engine/analyzer/python/common/python-analyzer.ts
index 427ad6df..c1fba6e0 100644
--- a/src/engine/analyzer/python/common/python-analyzer.ts
+++ b/src/engine/analyzer/python/common/python-analyzer.ts
@@ -246,6 +246,21 @@ class PythonAnalyzer extends (Analyzer as any) {
     return SymbolValue(new_node)
   }
 
+  /**
+   *
+   * @param fclos
+   * @param argvalues
+   * @param state
+   * @param node
+   * @param scope
+   */
+  executeSingleCall(fclos: any, argvalues: any, state: any, node: any, scope: any) {
+    if (fclos.decorators?.some((d: any) => d.name === 'classmethod') && argvalues[0]?.vtype === 'undefine') {
+      argvalues[0] = fclos._this
+    }
+    return super.executeSingleCall(fclos, argvalues, state, node, scope)
+  }
+
   /**
    *
    * @param scope