diff --git a/src/components/structures/auth/Registration.tsx b/src/components/structures/auth/Registration.tsx
index 0ab90abb49..ab88c446ef 100644
--- a/src/components/structures/auth/Registration.tsx
+++ b/src/components/structures/auth/Registration.tsx
@@ -333,7 +333,7 @@ export default class Registration extends React.Component<IProps, IState> {
             } else if (response.errcode === "M_USER_IN_USE") {
                 errorText = _t("Someone already has that username, please try another.");
             } else if (response.errcode === "M_THREEPID_IN_USE") {
-                errorText = _t("That e-mail address is already in use.");
+                errorText = _t("That e-mail address or phone number is already in use.");
             }
 
             this.setState({
diff --git a/src/i18n/strings/en_EN.json b/src/i18n/strings/en_EN.json
index 9af1b476f1..e383e4ff26 100644
--- a/src/i18n/strings/en_EN.json
+++ b/src/i18n/strings/en_EN.json
@@ -3465,7 +3465,7 @@
     "Unable to query for supported registration methods.": "Unable to query for supported registration methods.",
     "This server does not support authentication with a phone number.": "This server does not support authentication with a phone number.",
     "Someone already has that username, please try another.": "Someone already has that username, please try another.",
-    "That e-mail address is already in use.": "That e-mail address is already in use.",
+    "That e-mail address or phone number is already in use.": "That e-mail address or phone number is already in use.",
     "Continue with %(ssoButtons)s": "Continue with %(ssoButtons)s",
     "%(ssoButtons)s Or %(usernamePassword)s": "%(ssoButtons)s Or %(usernamePassword)s",
     "Already have an account? <a>Sign in here</a>": "Already have an account? <a>Sign in here</a>",