diff --git a/packages/svelte/src/internal/client/reactivity/deriveds.js b/packages/svelte/src/internal/client/reactivity/deriveds.js
index 88d22f59c9..a3c71a1974 100644
--- a/packages/svelte/src/internal/client/reactivity/deriveds.js
+++ b/packages/svelte/src/internal/client/reactivity/deriveds.js
@@ -26,7 +26,7 @@ export function derived(fn) {
 		b: current_block,
 		reactions: null,
 		d: null,
-		e: default_equals,
+		eq: default_equals,
 		f: flags,
 		i: fn,
 		r: null,
@@ -56,7 +56,7 @@ export function derived(fn) {
 /*#__NO_SIDE_EFFECTS__*/
 export function derived_safe_equal(fn) {
 	const signal = derived(fn);
-	signal.e = safe_equal;
+	signal.eq = safe_equal;
 	return signal;
 }
 
diff --git a/packages/svelte/src/internal/client/reactivity/effects.js b/packages/svelte/src/internal/client/reactivity/effects.js
index 32412e29e7..0301381e70 100644
--- a/packages/svelte/src/internal/client/reactivity/effects.js
+++ b/packages/svelte/src/internal/client/reactivity/effects.js
@@ -44,7 +44,6 @@ function create_effect(type, fn, sync, block, schedule) {
 	const signal = {
 		b: block,
 		d: null,
-		e: null,
 		f: type | DIRTY,
 		l: 0,
 		i: fn,
diff --git a/packages/svelte/src/internal/client/reactivity/sources.js b/packages/svelte/src/internal/client/reactivity/sources.js
index bb663222f0..7c0c7122f8 100644
--- a/packages/svelte/src/internal/client/reactivity/sources.js
+++ b/packages/svelte/src/internal/client/reactivity/sources.js
@@ -31,7 +31,7 @@ export function source(value) {
 	/** @type {import('#client').Source<V>} */
 	const source = {
 		reactions: null,
-		e: default_equals,
+		eq: default_equals,
 		f: SOURCE | CLEAN,
 		v: value,
 		w: 0
@@ -52,7 +52,7 @@ export function source(value) {
 /*#__NO_SIDE_EFFECTS__*/
 export function mutable_source(initial_value) {
 	const s = source(initial_value);
-	s.e = safe_equal;
+	s.eq = safe_equal;
 
 	// bind the signal to the component context, in case we need to
 	// track updates to trigger beforeUpdate/afterUpdate callbacks
@@ -111,7 +111,7 @@ export function set(signal, value) {
 	}
 	if (
 		(signal.f & SOURCE) !== 0 &&
-		!(/** @type {import('#client').EqualsFunctions} */ (signal.e)(value, signal.v))
+		!(/** @type {import('#client').EqualsFunctions} */ (signal.eq)(value, signal.v))
 	) {
 		signal.v = value;
 		// Increment write version so that unowned signals can properly track dirtyness
diff --git a/packages/svelte/src/internal/client/reactivity/types.d.ts b/packages/svelte/src/internal/client/reactivity/types.d.ts
index b4cbc701fb..c560727fcd 100644
--- a/packages/svelte/src/internal/client/reactivity/types.d.ts
+++ b/packages/svelte/src/internal/client/reactivity/types.d.ts
@@ -12,8 +12,8 @@ export type EffectType = typeof EFFECT | typeof PRE_EFFECT | typeof RENDER_EFFEC
 export interface Source<V = unknown> {
 	/** Signals that read from this signal */
 	reactions: null | Reaction[];
-	/** equals: For value equality */
-	e: null | EqualsFunctions;
+	/** Equality function */
+	eq: EqualsFunctions;
 	/** flags: The types that the signal represent, as a bitwise value */
 	f: SignalFlags;
 	/** value: The latest value for this signal */
@@ -55,8 +55,6 @@ export type Effect = {
 	d: null | Value[];
 	/** destroy: Thing(s) that need destroying */
 	y: null | (() => void);
-	/** equals: For value equality */
-	e: null | EqualsFunctions;
 	/** The types that the signal represent, as a bitwise value */
 	f: SignalFlags;
 	/** init: The function that we invoke for effects and computeds */
diff --git a/packages/svelte/src/internal/client/render.js b/packages/svelte/src/internal/client/render.js
index 019b5f1167..5135ecde4e 100644
--- a/packages/svelte/src/internal/client/render.js
+++ b/packages/svelte/src/internal/client/render.js
@@ -2829,7 +2829,7 @@ export function prop(props, key, flags, initial) {
 		return (inner_current_value.v = parent_value);
 	});
 
-	if (!immutable) current_value.e = safe_equal;
+	if (!immutable) current_value.eq = safe_equal;
 
 	return function (/** @type {V} */ value, mutation = false) {
 		var current = get(current_value);
diff --git a/packages/svelte/src/internal/client/runtime.js b/packages/svelte/src/internal/client/runtime.js
index 54966044a4..f6d2e76874 100644
--- a/packages/svelte/src/internal/client/runtime.js
+++ b/packages/svelte/src/internal/client/runtime.js
@@ -693,7 +693,7 @@ function update_derived(signal, force_schedule) {
 			? MAYBE_DIRTY
 			: CLEAN;
 	set_signal_status(signal, status);
-	const equals = /** @type {import('./types.js').EqualsFunctions} */ (signal.e);
+	const equals = /** @type {import('./types.js').EqualsFunctions} */ (signal.eq);
 	if (!equals(value, signal.v)) {
 		signal.v = value;
 		mark_reactions(signal, DIRTY, force_schedule);