diff --git a/nativescript-core/ui/bottom-navigation/bottom-navigation.android.ts b/nativescript-core/ui/bottom-navigation/bottom-navigation.android.ts
index 49081f259..0048ed524 100644
--- a/nativescript-core/ui/bottom-navigation/bottom-navigation.android.ts
+++ b/nativescript-core/ui/bottom-navigation/bottom-navigation.android.ts
@@ -391,7 +391,7 @@ export class BottomNavigation extends TabNavigationBase {
         if (this._manager && this._manager.isDestroyed()) {
             return;
         }
-        
+
         this._attachedToWindow = true;
         this.changeTab(this.selectedIndex);
     }
@@ -705,7 +705,10 @@ export class BottomNavigation extends TabNavigationBase {
     }
 
     public setTabBarItemFontInternal(tabStripItem: TabStripItem, value: Font): void {
-        tabStripItem.nativeViewProtected.setTextSize(value.fontSize);
+        if (value.fontSize) {
+            tabStripItem.nativeViewProtected.setTextSize(value.fontSize);
+        }
+
         tabStripItem.nativeViewProtected.setTypeface(value.getAndroidTypeface());
     }
 
diff --git a/nativescript-core/ui/tab-navigation-base/tab-strip-item/tab-strip-item.ts b/nativescript-core/ui/tab-navigation-base/tab-strip-item/tab-strip-item.ts
index bab24db82..ead226c81 100644
--- a/nativescript-core/ui/tab-navigation-base/tab-strip-item/tab-strip-item.ts
+++ b/nativescript-core/ui/tab-navigation-base/tab-strip-item/tab-strip-item.ts
@@ -127,7 +127,7 @@ export class TabStripItem extends View implements TabStripItemDefinition, AddChi
             const parent = <TabStrip>this.parent;
             const tabStripParent = parent && <TabNavigationBase>parent.parent;
 
-            return tabStripParent && (<any>tabStripParent).setTabBarIconColor(this, args.value);
+            return tabStripParent && tabStripParent.setTabBarIconColor(this, args.value);
         });
         this.image.style.on("colorChange", this._imageColorHandler);
 
@@ -135,7 +135,7 @@ export class TabStripItem extends View implements TabStripItemDefinition, AddChi
             const parent = <TabStrip>this.parent;
             const tabStripParent = parent && <TabNavigationBase>parent.parent;
 
-            return tabStripParent && (<any>tabStripParent).setTabBarIconColor(this, args.value);
+            return tabStripParent && tabStripParent.setTabBarIconColor(this, args.value);
         });
         this.image.style.on("fontInternalChange", this._imageFontHandler);
 
@@ -143,7 +143,7 @@ export class TabStripItem extends View implements TabStripItemDefinition, AddChi
             const parent = <TabStrip>this.parent;
             const tabStripParent = parent && <TabNavigationBase>parent.parent;
 
-            return tabStripParent && (<any>tabStripParent).setTabBarIconColor(this, args.value);
+            return tabStripParent && tabStripParent.setTabBarIconColor(this, args.value);
         });
         this.image.on("srcChange", this._imageSrcHandler);
     }
diff --git a/nativescript-core/ui/tabs/tabs.android.ts b/nativescript-core/ui/tabs/tabs.android.ts
index 6008b7980..6d9e446be 100644
--- a/nativescript-core/ui/tabs/tabs.android.ts
+++ b/nativescript-core/ui/tabs/tabs.android.ts
@@ -819,7 +819,9 @@ export class Tabs extends TabsBase {
     }
 
     public setTabBarItemFontInternal(tabStripItem: TabStripItem, value: Font): void {
-        tabStripItem.nativeViewProtected.setTextSize(value.fontSize);
+        if (value.fontSize) {
+            tabStripItem.nativeViewProtected.setTextSize(value.fontSize);
+        }
         tabStripItem.nativeViewProtected.setTypeface(value.getAndroidTypeface());
     }