diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index b839dafd3e8..8d134ac6839 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -7633,7 +7633,7 @@ module ts {
             // This elementType will be used if the specific property corresponding to this index is not
             // present (aka the tuple element property). This call also checks that the parentType is in
             // fact an iterable or array (depending on target language).
-            let elementType = checkIteratedTypeOrElementType(sourceType, node, /*allowStringInput*/ false);
+            let elementType = checkIteratedTypeOrElementType(sourceType, node, /*allowStringInput*/ false) || unknownType;
             let elements = node.elements;
             for (let i = 0; i < elements.length; i++) {
                 let e = elements[i];
diff --git a/tests/baselines/reference/assignmentRestElementWithErrorSourceType.errors.txt b/tests/baselines/reference/assignmentRestElementWithErrorSourceType.errors.txt
new file mode 100644
index 00000000000..080aca5a7ac
--- /dev/null
+++ b/tests/baselines/reference/assignmentRestElementWithErrorSourceType.errors.txt
@@ -0,0 +1,11 @@
+tests/cases/compiler/assignmentRestElementWithErrorSourceType.ts(2,5): error TS2304: Cannot find name 'c'.
+tests/cases/compiler/assignmentRestElementWithErrorSourceType.ts(2,10): error TS2304: Cannot find name 'tupel'.
+
+
+==== tests/cases/compiler/assignmentRestElementWithErrorSourceType.ts (2 errors) ====
+    var tuple: [string, number];
+    [...c] = tupel; // intentionally misspelled
+        ~
+!!! error TS2304: Cannot find name 'c'.
+             ~~~~~
+!!! error TS2304: Cannot find name 'tupel'.
\ No newline at end of file
diff --git a/tests/baselines/reference/assignmentRestElementWithErrorSourceType.js b/tests/baselines/reference/assignmentRestElementWithErrorSourceType.js
new file mode 100644
index 00000000000..0a1109a14f7
--- /dev/null
+++ b/tests/baselines/reference/assignmentRestElementWithErrorSourceType.js
@@ -0,0 +1,7 @@
+//// [assignmentRestElementWithErrorSourceType.ts]
+var tuple: [string, number];
+[...c] = tupel; // intentionally misspelled
+
+//// [assignmentRestElementWithErrorSourceType.js]
+var tuple;
+c = tupel.slice(0); // intentionally misspelled
diff --git a/tests/cases/compiler/assignmentRestElementWithErrorSourceType.ts b/tests/cases/compiler/assignmentRestElementWithErrorSourceType.ts
new file mode 100644
index 00000000000..21b437be48e
--- /dev/null
+++ b/tests/cases/compiler/assignmentRestElementWithErrorSourceType.ts
@@ -0,0 +1,2 @@
+var tuple: [string, number];
+[...c] = tupel; // intentionally misspelled
\ No newline at end of file