diff --git a/src/annotations.js b/src/annotations.js
index ac98310..ecbcb56 100644
--- a/src/annotations.js
+++ b/src/annotations.js
@@ -32,7 +32,7 @@ class Annotations {
 	 * @returns {Annotation} annotation
 	 */
 	add (type, cfiRange, data, cb, className, styles) {
-		let hash = encodeURI(cfiRange);
+		let hash = encodeURI(cfiRange + type);
 		let cfi = new EpubCFI(cfiRange);
 		let sectionIndex = cfi.spinePos;
 		let annotation = new Annotation({
@@ -70,7 +70,7 @@ class Annotations {
 	 * @param {string} type Type of annotation to add: "highlight", "underline", "mark"
 	 */
 	remove (cfiRange, type) {
-		let hash = encodeURI(cfiRange);
+		let hash = encodeURI(cfiRange + type);
 
 		if (hash in this._annotations) {
 			let annotation = this._annotations[hash];