diff --git a/terraform/resource.go b/terraform/resource.go
index 994009ac7..85ddebe86 100644
--- a/terraform/resource.go
+++ b/terraform/resource.go
@@ -297,14 +297,14 @@ func newResourceConfigShimmedComputedKeys(obj cty.Value, schema *configschema.Bl
 			i := 0
 			for it := blockVal.ElementIterator(); it.Next(); i++ {
 				_, subVal := it.Element()
-				subPrefix := fmt.Sprintf("%s.%s%d.", typeName, prefix, i)
+				subPrefix := fmt.Sprintf("%s%s.%d.", prefix, typeName, i)
 				keys := newResourceConfigShimmedComputedKeys(subVal, &blockS.Block, subPrefix)
 				ret = append(ret, keys...)
 			}
 		case configschema.NestingMap:
 			for it := blockVal.ElementIterator(); it.Next(); {
 				subK, subVal := it.Element()
-				subPrefix := fmt.Sprintf("%s.%s%s.", typeName, prefix, subK.AsString())
+				subPrefix := fmt.Sprintf("%s%s.%s.", prefix, typeName, subK.AsString())
 				keys := newResourceConfigShimmedComputedKeys(subVal, &blockS.Block, subPrefix)
 				ret = append(ret, keys...)
 			}
diff --git a/terraform/resource_test.go b/terraform/resource_test.go
index 66b91b0a7..6e82653c7 100644
--- a/terraform/resource_test.go
+++ b/terraform/resource_test.go
@@ -929,6 +929,58 @@ func TestNewResourceConfigShimmed(t *testing.T) {
 				},
 			},
 		},
+		{
+			Name: "unknown in nested blocks",
+			Val: cty.ObjectVal(map[string]cty.Value{
+				"bar": cty.ListVal([]cty.Value{
+					cty.ObjectVal(map[string]cty.Value{
+						"baz": cty.ListVal([]cty.Value{
+							cty.ObjectVal(map[string]cty.Value{
+								"list": cty.UnknownVal(cty.List(cty.String)),
+							}),
+						}),
+					}),
+				}),
+			}),
+			Schema: &configschema.Block{
+				BlockTypes: map[string]*configschema.NestedBlock{
+					"bar": {
+						Block: configschema.Block{
+							BlockTypes: map[string]*configschema.NestedBlock{
+								"baz": {
+									Block: configschema.Block{
+										Attributes: map[string]*configschema.Attribute{
+											"list": {Type: cty.List(cty.String),
+												Optional: true,
+											},
+										},
+									},
+									Nesting: configschema.NestingList,
+								},
+							},
+						},
+						Nesting: configschema.NestingList,
+					},
+				},
+			},
+			Expected: &ResourceConfig{
+				ComputedKeys: []string{"bar.0.baz.0.list"},
+				Raw: map[string]interface{}{
+					"bar": []interface{}{map[string]interface{}{
+						"baz": []interface{}{map[string]interface{}{
+							"list": "74D93920-ED26-11E3-AC10-0800200C9A66",
+						}},
+					}},
+				},
+				Config: map[string]interface{}{
+					"bar": []interface{}{map[string]interface{}{
+						"baz": []interface{}{map[string]interface{}{
+							"list": "74D93920-ED26-11E3-AC10-0800200C9A66",
+						}},
+					}},
+				},
+			},
+		},
 		{
 			Name: "null blocks",
 			Val: cty.ObjectVal(map[string]cty.Value{