diff --git a/tns-core-modules/image-source/image-source.android.ts b/tns-core-modules/image-source/image-source.android.ts
index 8ed1b7f48..f8847d5b3 100644
--- a/tns-core-modules/image-source/image-source.android.ts
+++ b/tns-core-modules/image-source/image-source.android.ts
@@ -139,9 +139,11 @@ export class ImageSource implements ImageSourceDefinition {
         });
     }
 
-    public setNativeSource(source: any): boolean {
+    public setNativeSource(source: any): void {
+        if (source && !(source instanceof android.graphics.Bitmap)) {
+            throw new Error("The method setNativeSource() expects android.graphics.Bitmap instance.");
+        }
         this.android = source;
-        return source != null;
     }
 
     public saveToFile(path: string, format: "png" | "jpeg" | "jpg", quality = 100): boolean {
@@ -239,8 +241,9 @@ export function fromBase64(source: string): ImageSource {
 }
 
 export function fromNativeSource(source: any): ImageSource {
-    const image = new ImageSource();
-    return image.setNativeSource(source) ? image : null;
+    const imageSource = new ImageSource();
+    imageSource.setNativeSource(source);
+    return imageSource;
 }
 
 export function fromUrl(url: string): Promise<ImageSourceDefinition> {
diff --git a/tns-core-modules/image-source/image-source.d.ts b/tns-core-modules/image-source/image-source.d.ts
index 23fd5bb59..adde48c27 100644
--- a/tns-core-modules/image-source/image-source.d.ts
+++ b/tns-core-modules/image-source/image-source.d.ts
@@ -88,11 +88,11 @@ export class ImageSource {
     fromBase64(source: string): Promise<boolean>;        
 
    /**
-    * Sets the provided native source object (typically a Bitmap).
+    * Sets the provided native source object (typically a Bitmap or a UIImage).
     * This will update either the android or ios properties, depending on the target os.
     * @param source The native image object. Will be either a Bitmap for Android or a UIImage for iOS.
     */
-    setNativeSource(source: any): boolean;
+    setNativeSource(source: any): void;
 
    /**
     * Saves this instance to the specified file, using the provided image format and quality.
diff --git a/tns-core-modules/image-source/image-source.ios.ts b/tns-core-modules/image-source/image-source.ios.ts
index b27f28b49..9cd55e34c 100644
--- a/tns-core-modules/image-source/image-source.ios.ts
+++ b/tns-core-modules/image-source/image-source.ios.ts
@@ -118,11 +118,11 @@ export class ImageSource implements ImageSourceDefinition {
         });
     }
 
-    public setNativeSource(source: any): boolean {
-        if (source instanceof UIImage) {
-            this.ios = source;
+    public setNativeSource(source: any): void {
+        if (source && !(source instanceof UIImage)) {
+            throw new Error("The method setNativeSource() expects UIImage instance.");
         }
-        return source != null;
+        this.ios = source;
     }
 
     public saveToFile(path: string, format: "png" | "jpeg" | "jpg", quality?: number): boolean {
@@ -221,8 +221,9 @@ export function fromBase64(source: string): ImageSource {
 }
 
 export function fromNativeSource(source: any): ImageSource {
-    const image = new ImageSource();
-    return image.setNativeSource(source) ? image : null;
+    const imageSource = new ImageSource();
+    imageSource.setNativeSource(source);
+    return imageSource;
 }
 
 export function fromUrl(url: string): Promise<ImageSource> {