diff --git a/src/runtime/internal/dev.ts b/src/runtime/internal/dev.ts
index 751f1f802b..28daa03ae8 100644
--- a/src/runtime/internal/dev.ts
+++ b/src/runtime/internal/dev.ts
@@ -73,7 +73,7 @@ export function dataset_dev(node: HTMLElement, property: string, value?: any) {
 
 export function set_data_dev(text, data) {
 	data = '' + data;
-	if (text.data === data) return;
+	if (text.wholeText === data) return;
 
 	dispatch_dev("SvelteDOMSetData", { node: text, data });
 	text.data = data;
diff --git a/src/runtime/internal/dom.ts b/src/runtime/internal/dom.ts
index 0cd670fcb9..7087336a6b 100644
--- a/src/runtime/internal/dom.ts
+++ b/src/runtime/internal/dom.ts
@@ -193,7 +193,7 @@ export function claim_space(nodes) {
 
 export function set_data(text, data) {
 	data = '' + data;
-	if (text.data !== data) text.data = data;
+	if (text.wholeText !== data) text.data = data;
 }
 
 export function set_input_value(input, value) {