diff --git a/src/index.ts b/src/index.ts
index 57119361..9d4e6e9c 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -313,10 +313,10 @@ function analyzeInternal<T extends boolean>(css: string, options: Options, useLo
 		} else if (node.type === STYLE_RULE) {
 			// Handle keyframe rules specially
 			if (inKeyframes && node.prelude) {
-				// In keyframes, the prelude is a SelectorList that may not have Selector children
-				// (e.g., "50%" is just a SelectorList with text, no Selector child)
-				if (node.prelude.type === SELECTOR_LIST && node.prelude.text) {
-					keyframeSelectors.p(node.prelude.text, toLoc(node.prelude))
+				if (node.prelude.type === SELECTOR_LIST && node.prelude.children.length > 0) {
+					for (let keyframe_selector of node.prelude.children) {
+						keyframeSelectors.p(keyframe_selector.text, toLoc(keyframe_selector))
+					}
 				}
 				// Don't count keyframe rules as regular rules, but continue walking
 				// children to count declarations inside keyframes
diff --git a/src/selectors/selectors.test.ts b/src/selectors/selectors.test.ts
index 0c8e97f9..19dfc210 100644
--- a/src/selectors/selectors.test.ts
+++ b/src/selectors/selectors.test.ts
@@ -199,6 +199,7 @@ test('counts <keyframes-selector>s', () => {
       50% {
         opacity: 0;
       }
+      90%,
       to {
         opacity: 1;
       }
@@ -219,14 +220,15 @@ test('counts <keyframes-selector>s', () => {
 	const actual = analyze(fixture).selectors
 	expect(actual.total).toBe(2)
 	expect(actual.keyframes).toEqual({
-		total: 4,
-		totalUnique: 3,
+		total: 5,
+		totalUnique: 4,
 		unique: {
 			from: 2,
+			'90%': 1,
 			to: 1,
 			'50%': 1,
 		},
-		uniquenessRatio: 3 / 4,
+		uniquenessRatio: 4 / 5,
 	})
 })