diff --git a/lib/rules/display-name.js b/lib/rules/display-name.js
index b4de069542..7108367ec2 100644
--- a/lib/rules/display-name.js
+++ b/lib/rules/display-name.js
@@ -198,7 +198,7 @@ module.exports = {
         if (!component) {
           return;
         }
-        markDisplayNameAsDeclared(component.node.type === 'TSAsExpression' ? component.node.expression : component.node);
+        markDisplayNameAsDeclared(astUtil.unwrapTSAsExpression(component.node));
       },
 
       'FunctionExpression, FunctionDeclaration, ArrowFunctionExpression'(node) {
diff --git a/lib/util/ast.js b/lib/util/ast.js
index 5664dcb512..8d0ec3cad8 100644
--- a/lib/util/ast.js
+++ b/lib/util/ast.js
@@ -339,6 +339,10 @@ function isAssignmentLHS(node) {
   );
 }
 
+function isTSAsExpression(node) {
+  return node && node.type === 'TSAsExpression';
+}
+
 /**
  * Extracts the expression node that is wrapped inside a TS type assertion
  *
@@ -346,8 +350,7 @@ function isAssignmentLHS(node) {
  * @returns {ASTNode} - unwrapped expression node
  */
 function unwrapTSAsExpression(node) {
-  if (node && node.type === 'TSAsExpression') return node.expression;
-  return node;
+  return isTSAsExpression(node) ? node.expression : node;
 }
 
 function isTSTypeReference(node) {
@@ -450,6 +453,7 @@ module.exports = {
   isFunctionLike,
   inConstructor,
   isNodeFirstInLine,
+  isTSAsExpression,
   unwrapTSAsExpression,
   traverseReturns,
   isTSTypeReference,