diff --git a/packages/babel-plugin-proposal-decorators/src/index.js b/packages/babel-plugin-proposal-decorators/src/index.js
index a7e9c5486aae..51d4a124d397 100644
--- a/packages/babel-plugin-proposal-decorators/src/index.js
+++ b/packages/babel-plugin-proposal-decorators/src/index.js
@@ -14,7 +14,7 @@ export default declare((api, options) => {
   if (legacy !== true) {
     throw new Error(
       "The new decorators proposal is not supported yet." +
-        ' You muse pass the `"legacy": true` option to' +
+        ' You must pass the `"legacy": true` option to' +
         " @babel/plugin-proposal-decorators",
     );
   }
diff --git a/packages/babel-preset-stage-0/src/index.js b/packages/babel-preset-stage-0/src/index.js
index 25bd1f26e777..855614351d6c 100644
--- a/packages/babel-preset-stage-0/src/index.js
+++ b/packages/babel-preset-stage-0/src/index.js
@@ -25,7 +25,7 @@ export default declare((api, opts = {}) => {
   if (decoratorsLegacy !== true) {
     throw new Error(
       "The new decorators proposal is not supported yet." +
-        ' You muse pass the `"decoratorsLegacy": true` option to' +
+        ' You must pass the `"decoratorsLegacy": true` option to' +
         " @babel/preset-stage-0",
     );
   }
diff --git a/packages/babel-preset-stage-1/src/index.js b/packages/babel-preset-stage-1/src/index.js
index 31b2e88a46c5..f4e47dce627c 100644
--- a/packages/babel-preset-stage-1/src/index.js
+++ b/packages/babel-preset-stage-1/src/index.js
@@ -30,7 +30,7 @@ export default declare((api, opts = {}) => {
   if (decoratorsLegacy !== true) {
     throw new Error(
       "The new decorators proposal is not supported yet." +
-        ' You muse pass the `"decoratorsLegacy": true` option to' +
+        ' You must pass the `"decoratorsLegacy": true` option to' +
         " @babel/preset-stage-1",
     );
   }
diff --git a/packages/babel-preset-stage-2/src/index.js b/packages/babel-preset-stage-2/src/index.js
index fa87562bf974..f40084eac7a4 100644
--- a/packages/babel-preset-stage-2/src/index.js
+++ b/packages/babel-preset-stage-2/src/index.js
@@ -29,7 +29,7 @@ export default declare((api, opts = {}) => {
   if (decoratorsLegacy !== true) {
     throw new Error(
       "The new decorators proposal is not supported yet." +
-        ' You muse pass the `"decoratorsLegacy": true` option to' +
+        ' You must pass the `"decoratorsLegacy": true` option to' +
         " @babel/preset-stage-2",
     );
   }