diff --git a/utbot-framework/src/main/kotlin/org/utbot/framework/assemble/AssembleModelGenerator.kt b/utbot-framework/src/main/kotlin/org/utbot/framework/assemble/AssembleModelGenerator.kt
index 66fd1632f3..984b94d2ca 100644
--- a/utbot-framework/src/main/kotlin/org/utbot/framework/assemble/AssembleModelGenerator.kt
+++ b/utbot-framework/src/main/kotlin/org/utbot/framework/assemble/AssembleModelGenerator.kt
@@ -420,7 +420,7 @@ class AssembleModelGenerator(private val basePackageName: String) {
         get() = this.isPublic || !this.isPrivate && this.packageName == basePackageName
 
     private val Constructor<*>.isVisible : Boolean
-        get() = this.isPublic || !this.isPrivate && this.declaringClass.packageName == basePackageName
+        get() = this.isPublic || !this.isPrivate && this.declaringClass.`package`.name == basePackageName
 
     /**
      * Creates setter or direct setter call to set a field.