diff --git a/src/resolver.ts b/src/resolver.ts
index 8f90a76f3b..ca05a3424b 100644
--- a/src/resolver.ts
+++ b/src/resolver.ts
@@ -392,7 +392,7 @@ export class Resolver extends DiagnosticEmitter {
           break;
         }
         case ParameterKind.Rest: {
-          assert(i == numParameters);
+          assert(i == numParameters - 1);
           hasRest = true;
           break;
         }
diff --git a/tests/compiler/issues/2707.json b/tests/compiler/issues/2707.json
new file mode 100644
index 0000000000..5d2bf93db3
--- /dev/null
+++ b/tests/compiler/issues/2707.json
@@ -0,0 +1,7 @@
+{
+  "asc_flags": [],
+  "stderr": [
+    "AS100: Not implemented: Rest parameters",
+    "func(1, 2, 3, 4);"
+  ]
+}
diff --git a/tests/compiler/issues/2707.ts b/tests/compiler/issues/2707.ts
new file mode 100644
index 0000000000..dc380b73d6
--- /dev/null
+++ b/tests/compiler/issues/2707.ts
@@ -0,0 +1,6 @@
+// should not crash
+let func: (...args: i32[]) => i32 = (...args: i32[]) => {
+  return 1;
+};
+
+func(1, 2, 3, 4);