diff --git a/src/app/components/inputnumber/inputnumber.ts b/src/app/components/inputnumber/inputnumber.ts
index 83f4824d11e..95ec49c2624 100644
--- a/src/app/components/inputnumber/inputnumber.ts
+++ b/src/app/components/inputnumber/inputnumber.ts
@@ -114,7 +114,7 @@ export const INPUTNUMBER_VALUE_ACCESSOR: any = {
                     class="p-button-icon-only"
                     [class]="incrementButtonClass"
                     [disabled]="disabled"
-                    tabindex="-1"
+                    tabindex="0"
                     (mousedown)="onUpButtonMouseDown($event)"
                     (mouseup)="onUpButtonMouseUp()"
                     (mouseleave)="onUpButtonMouseLeave()"
@@ -136,7 +136,7 @@ export const INPUTNUMBER_VALUE_ACCESSOR: any = {
                     class="p-button-icon-only"
                     [class]="decrementButtonClass"
                     [disabled]="disabled"
-                    tabindex="-1"
+                    tabindex="0"
                     [attr.aria-hidden]="true"
                     (mousedown)="onDownButtonMouseDown($event)"
                     (mouseup)="onDownButtonMouseUp()"
@@ -160,7 +160,7 @@ export const INPUTNUMBER_VALUE_ACCESSOR: any = {
                 [class]="incrementButtonClass"
                 class="p-button-icon-only"
                 [disabled]="disabled"
-                tabindex="-1"
+                tabindex="0"
                 [attr.aria-hidden]="true"
                 (mousedown)="onUpButtonMouseDown($event)"
                 (mouseup)="onUpButtonMouseUp()"
@@ -183,7 +183,7 @@ export const INPUTNUMBER_VALUE_ACCESSOR: any = {
                 class="p-button-icon-only"
                 [class]="decrementButtonClass"
                 [disabled]="disabled"
-                tabindex="-1"
+                tabindex="0"
                 [attr.aria-hidden]="true"
                 (mousedown)="onDownButtonMouseDown($event)"
                 (mouseup)="onDownButtonMouseUp()"