diff --git a/src/com/google/javascript/jscomp/Es6RewriteModulesToCommonJsModules.java b/src/com/google/javascript/jscomp/Es6RewriteModulesToCommonJsModules.java
index 9c3fbf9dfa1..a8a41403e2d 100644
--- a/src/com/google/javascript/jscomp/Es6RewriteModulesToCommonJsModules.java
+++ b/src/com/google/javascript/jscomp/Es6RewriteModulesToCommonJsModules.java
@@ -93,10 +93,22 @@ private static class LocalQName {
    * <p>Absolute import paths need to match the registered path exactly. Some {@link
    * ModuleLoader.ModulePath}s will have a leading slash and some won't. So in order to have
    * everything line up AND preserve schemes (if they exist) then just strip leading /.
+   *
+   * <p>Additionally if any path contains a protocol it will be stripped only the path part will
+   * remain. This is done heuristically as we cannot use {@link java.net.URL} or {@link
+   * java.nio.file.Path} due to GWT. As a result of stripping this cross-domain imports are not
+   * compatible with this pass.
    */
   private static String normalizePath(String path) {
-    if (path.startsWith("/")) {
-      return path.substring(1);
+    int indexOfProtocol = path.indexOf("://");
+    if (indexOfProtocol > -1) {
+      path = path.substring(indexOfProtocol + 3);
+      int indexOfSlash = path.indexOf('/');
+      if (indexOfSlash > -1) {
+        path = path.substring(indexOfSlash + 1);
+      }
+    } else if (path.startsWith("/")) {
+      path = path.substring(1);
     }
     return path;
   }
@@ -383,6 +395,12 @@ private void addExport(Node definePropertiesLit, String exportedName, LocalQName
     }
 
     private void visitImport(ModuleLoader.ModulePath path, Node importDecl) {
+      if (importDecl.getLastChild().getString().contains("://")) {
+        compiler.report(
+            JSError.make(
+                importDecl, Es6ToEs3Util.CANNOT_CONVERT, "Module requests with protocols."));
+      }
+
       // Normalize the import path according to the module resolution scheme so that bundles are
       // compatible with the compiler's module loader options.
       importRequests.add(
diff --git a/test/com/google/javascript/jscomp/Es6RewriteModulesToCommonJsModulesTest.java b/test/com/google/javascript/jscomp/Es6RewriteModulesToCommonJsModulesTest.java
index 3b1805aa46e..01fcd2dcf10 100644
--- a/test/com/google/javascript/jscomp/Es6RewriteModulesToCommonJsModulesTest.java
+++ b/test/com/google/javascript/jscomp/Es6RewriteModulesToCommonJsModulesTest.java
@@ -467,7 +467,7 @@ public void testExportWithArguments() {
             "}, 'testcode', []);"));
   }
 
-  public void testFileNameIsPreservedInRegisteredPathWhenNotEscaping() {
+  public void testProtocolAndDomainAreRemovedInRegisteredPathWhenNotEscaping() {
     pathEscaper = PathEscaper.CANONICALIZE_ONLY;
     test(
         srcs(SourceFile.fromCode("https://example.domain.google.com/test.js", "export var x;")),
@@ -486,21 +486,11 @@ public void testFileNameIsPreservedInRegisteredPathWhenNotEscaping() {
                     "    },",
                     "  });",
                     "  var x;",
-                    "}, 'https://example.domain.google.com/test.js', []);"))));
+                    "}, 'test.js', []);"))));
   }
 
-  public void testFileNameIsPreservedInRequiredPathWhenNotEscaping() {
-    pathEscaper = PathEscaper.CANONICALIZE_ONLY;
-    test(
-        srcs(SourceFile.fromCode("test.js", "import 'file://imported.js';")),
-        expected(
-            SourceFile.fromCode(
-                "https://example.domain.google.com/test.js",
-                lines(
-                    "$jscomp.registerAndLoadModule(function($$require, $$exports, $$module) {",
-                    "  'test pragma';",
-                    "  var module$file_$$imported = $$require('file://imported.js');",
-                    "}, 'test.js', ['file://imported.js']);"))));
+  public void testProtocolInImportPathIsError() {
+    testError("import * as foo from 'file://imported.js';", Es6ToEs3Util.CANNOT_CONVERT);
   }
 
   public void testRegisteredPathDoesNotIncludeModuleRoot() {