diff --git a/aio/tools/transforms/angular-base-package/post-processors/add-image-dimensions.js b/aio/tools/transforms/angular-base-package/post-processors/add-image-dimensions.js
index 1a068d00ee..075c0de44d 100644
--- a/aio/tools/transforms/angular-base-package/post-processors/add-image-dimensions.js
+++ b/aio/tools/transforms/angular-base-package/post-processors/add-image-dimensions.js
@@ -20,14 +20,16 @@ module.exports = function addImageDimensions(getImageDimensions) {
           const src = props.src;
           if (!src) {
             file.message('Missing src in image tag `' + source(node, file) + '`');
-          } else if (props.width === undefined && props.height === undefined) {
+          } else {
             try {
               const dimensions = getImageDimensions(addImageDimensionsImpl.basePath, src);
-              props.width = '' + dimensions.width;
-              props.height = '' + dimensions.height;
+              if (props.width === undefined && props.height === undefined) {
+                props.width = '' + dimensions.width;
+                props.height = '' + dimensions.height;
+              }
             } catch(e) {
               if (e.code === 'ENOENT') {
-                file.message('Unable to load src in image tag `' + source(node, file) + '`');
+                file.fail('Unable to load src in image tag `' + source(node, file) + '`');
               } else {
                 file.fail(e.message);
               }
diff --git a/aio/tools/transforms/angular-base-package/post-processors/add-image-dimensions.spec.js b/aio/tools/transforms/angular-base-package/post-processors/add-image-dimensions.spec.js
index 432fad9347..411984a889 100644
--- a/aio/tools/transforms/angular-base-package/post-processors/add-image-dimensions.spec.js
+++ b/aio/tools/transforms/angular-base-package/post-processors/add-image-dimensions.spec.js
@@ -58,7 +58,7 @@ describe('addImageDimensions post-processor', () => {
     expect(log.warn).toHaveBeenCalled();
   });
 
-  it('should log a warning for images whose source cannot be loaded', () => {
+  it('should fail for images whose source cannot be loaded', () => {
     getImageDimensionsSpy.and.callFake(() => {
       const error = new Error('no such file or directory');
       error.code = 'ENOENT';
@@ -68,13 +68,8 @@ describe('addImageDimensions post-processor', () => {
       docType: 'a',
       renderedContent: '<img src="missing">'
     }];
-    processor.$process(docs);
+    expect(() => processor.$process(docs)).toThrowError('Unable to load src in image tag `<img src="missing">` - doc (a) ');
     expect(getImageDimensionsSpy).toHaveBeenCalled();
-    expect(docs).toEqual([jasmine.objectContaining({
-      docType: 'a',
-      renderedContent: '<img src="missing">'
-    })]);
-    expect(log.warn).toHaveBeenCalled();
   });
 
   it('should ignore images with width or height attributes', () => {
@@ -87,7 +82,6 @@ describe('addImageDimensions post-processor', () => {
       `
     }];
     processor.$process(docs);
-    expect(getImageDimensionsSpy).not.toHaveBeenCalled();
     expect(docs).toEqual([jasmine.objectContaining({
       docType: 'a',
       renderedContent: `