diff --git a/src/node.ts b/src/node.ts
index 73a5630d..99c50097 100644
--- a/src/node.ts
+++ b/src/node.ts
@@ -300,7 +300,7 @@ export class Link extends EventEmitter {
     this.emit('child:delete', link, this);
   }
 
-  getChild(name: string): Link {
+  getChild(name: string): Link | undefined {
     if (Object.hasOwnProperty.call(this.children, name)) {
       return this.children[name];
     }
diff --git a/src/volume.ts b/src/volume.ts
index fa3c453f..127cebda 100644
--- a/src/volume.ts
+++ b/src/volume.ts
@@ -1415,7 +1415,7 @@ export class Volume {
   private realpathBase(filename: string, encoding: TEncodingExtended | undefined): TDataOut {
     const steps = filenameToSteps(filename);
     const realLink = this.getResolvedLink(steps);
-    if (!realLink) throwError(ENOENT, 'realpath', filename);
+    if (!realLink) throw createError(ENOENT, 'realpath', filename);
 
     return strToEncoding(realLink.getPath(), encoding);
   }
@@ -1459,7 +1459,7 @@ export class Volume {
   private statBase(filename: string, bigint: true): Stats<bigint>;
   private statBase(filename: string, bigint: boolean = false): Stats {
     const link = this.getResolvedLink(filenameToSteps(filename));
-    if (!link) throwError(ENOENT, 'stat', filename);
+    if (!link) throw createError(ENOENT, 'stat', filename);
 
     return Stats.build(link.getNode(), bigint);
   }