diff --git a/vim-engine/src/main/kotlin/com/maddyhome/idea/vim/vimscript/model/variables/RegisterVariable.kt b/vim-engine/src/main/kotlin/com/maddyhome/idea/vim/vimscript/model/variables/RegisterVariable.kt
index 17d1da0f78..52ac661a48 100644
--- a/vim-engine/src/main/kotlin/com/maddyhome/idea/vim/vimscript/model/variables/RegisterVariable.kt
+++ b/vim-engine/src/main/kotlin/com/maddyhome/idea/vim/vimscript/model/variables/RegisterVariable.kt
@@ -25,7 +25,7 @@ import com.maddyhome.idea.vim.vimscript.model.datatypes.VimString
  * 'clipboard' contains "unnamed" or "unnamedplus", then it is
  * "*" or '+' ("unnamedplus" prevails).
  */
-class RegisterVariable : Variable() {
+class RegisterVariable : Variable {
 
   override fun evaluate(
     name: String,
diff --git a/vim-engine/src/main/kotlin/com/maddyhome/idea/vim/vimscript/model/variables/Variable.kt b/vim-engine/src/main/kotlin/com/maddyhome/idea/vim/vimscript/model/variables/Variable.kt
index 710f5f35cc..14a6d6eb0b 100644
--- a/vim-engine/src/main/kotlin/com/maddyhome/idea/vim/vimscript/model/variables/Variable.kt
+++ b/vim-engine/src/main/kotlin/com/maddyhome/idea/vim/vimscript/model/variables/Variable.kt
@@ -16,6 +16,6 @@ import com.maddyhome.idea.vim.vimscript.model.datatypes.VimDataType
 /**
  * Base class for Vim variables
  */
-abstract class Variable {
-  abstract fun evaluate(name: String, editor: VimEditor, context: ExecutionContext, vimContext: VimLContext): VimDataType
+interface Variable {
+  fun evaluate(name: String, editor: VimEditor, context: ExecutionContext, vimContext: VimLContext): VimDataType
 }
\ No newline at end of file