diff --git a/sjsonnet/src/sjsonnet/Evaluator.scala b/sjsonnet/src/sjsonnet/Evaluator.scala
index e41deda5..908791ee 100644
--- a/sjsonnet/src/sjsonnet/Evaluator.scala
+++ b/sjsonnet/src/sjsonnet/Evaluator.scala
@@ -810,6 +810,7 @@ class Evaluator(
 
   protected def materializeError(value: Val): String = value match {
     case Val.Str(_, s) => s
+    case _: Val.Func   => "Couldn't manifest function as JSON"
     case r             => Materializer.stringify(r)
   }
 
diff --git a/sjsonnet/test/resources/go_test_suite/error_function_fail.jsonnet.golden b/sjsonnet/test/resources/go_test_suite/error_function_fail.jsonnet.golden
index a83dbafd..73000771 100644
--- a/sjsonnet/test/resources/go_test_suite/error_function_fail.jsonnet.golden
+++ b/sjsonnet/test/resources/go_test_suite/error_function_fail.jsonnet.golden
@@ -1,3 +1,3 @@
-sjsonnet.Error: Couldn't manifest function with params [x]
+sjsonnet.Error: Couldn't manifest function as JSON
     at [<root>].(error_function_fail.jsonnet:1:1)
 
diff --git a/sjsonnet/test/resources/new_test_suite/error.error_function.jsonnet b/sjsonnet/test/resources/new_test_suite/error.error_function.jsonnet
new file mode 100644
index 00000000..b0166b39
--- /dev/null
+++ b/sjsonnet/test/resources/new_test_suite/error.error_function.jsonnet
@@ -0,0 +1 @@
+error function(x) x
diff --git a/sjsonnet/test/resources/new_test_suite/error.error_function.jsonnet.golden b/sjsonnet/test/resources/new_test_suite/error.error_function.jsonnet.golden
new file mode 100644
index 00000000..594635b5
--- /dev/null
+++ b/sjsonnet/test/resources/new_test_suite/error.error_function.jsonnet.golden
@@ -0,0 +1,2 @@
+sjsonnet.Error: Couldn't manifest function as JSON
+    at [<root>].(error.error_function.jsonnet:1:1)