diff --git a/src/cdk/listbox/listbox.spec.ts b/src/cdk/listbox/listbox.spec.ts
index d588431d4b5b..393f9c3123d3 100644
--- a/src/cdk/listbox/listbox.spec.ts
+++ b/src/cdk/listbox/listbox.spec.ts
@@ -926,7 +926,7 @@ describe('CdkOption and CdkListbox', () => {
       expect(() => {
         testComponent.formControl.setValue(['orange', 'banana']);
         fixture.detectChanges();
-      }).toThrowError('Listbox cannot have more than one selected value in multi-selection mode.');
+      }).toThrowError('Listbox cannot have more than one selected value in single selection mode.');
     });
 
     it('should throw when an invalid value is selected', () => {
diff --git a/src/cdk/listbox/listbox.ts b/src/cdk/listbox/listbox.ts
index 106cad5cde25..f721f8b3ab04 100644
--- a/src/cdk/listbox/listbox.ts
+++ b/src/cdk/listbox/listbox.ts
@@ -1018,7 +1018,7 @@ export class CdkListbox<T = unknown> implements AfterContentInit, OnDestroy, Con
       const invalidValues = this._getInvalidOptionValues(selected);
 
       if (!this.multiple && selected.length > 1) {
-        throw Error('Listbox cannot have more than one selected value in multi-selection mode.');
+        throw Error('Listbox cannot have more than one selected value in single selection mode.');
       }
 
       if (invalidValues.length) {