diff --git a/CHANGELOG.md b/CHANGELOG.md
index d57db931c27f..48f5bd94a98e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 ## Changelog
 ##### Unreleased
+- Added Opera Mobile compat data
 - Generate `core-js-compat/modules` since often we need just the list of `core-js` modules
 
 ##### 3.4.7 - 2019.12.03
diff --git a/packages/core-js-compat/compat.js b/packages/core-js-compat/compat.js
index 29dc918f51be..57fb88f87ff8 100644
--- a/packages/core-js-compat/compat.js
+++ b/packages/core-js-compat/compat.js
@@ -10,6 +10,7 @@ const mapping = new Map([
   ['and_ff', 'firefox'],
   ['ie_mob', 'ie'],
   ['ios_saf', 'ios'],
+  ['op_mob', 'opera_mobile'],
 ]);
 
 const validTargets = new Set([
@@ -22,6 +23,7 @@ const validTargets = new Set([
   'ios',
   'node',
   'opera',
+  'opera_mobile',
   'phantom',
   'safari',
   'samsung',
diff --git a/packages/core-js-compat/src/build-data.js b/packages/core-js-compat/src/build-data.js
index 138ebd372a99..b51ee36529a9 100644
--- a/packages/core-js-compat/src/build-data.js
+++ b/packages/core-js-compat/src/build-data.js
@@ -6,6 +6,7 @@ const data = require('./data');
 const {
   ChromeToNode,
   ChromeToSamsung,
+  ChromeToOperaMobile,
   ChromeToAndroid,
   ChromeToElectron,
   SafariToIOS,
@@ -20,7 +21,7 @@ for (const [key, module] of Object.entries(data)) {
     const source = semver(version);
     for (const [from, to] of mapping) {
       if (compare(source, '<=', from)) {
-        module[targetKey] = to;
+        module[targetKey] = String(to);
         return;
       }
     }
@@ -37,6 +38,11 @@ for (const [key, module] of Object.entries(data)) {
     if (!module.opera) {
       module.opera = String(chrome <= 23 ? 15 : chrome <= 29 ? 16 : chrome - 13);
     }
+    if (!module.opera_mobile && module.opera && module.opera <= 42) {
+      module.opera_mobile = module.opera;
+    } else {
+      map(ChromeToOperaMobile, chrome, 'opera_mobile');
+    }
     if (key.startsWith('es')) {
       map(ChromeToNode, chrome, 'node');
     }
diff --git a/packages/core-js-compat/src/mapping.js b/packages/core-js-compat/src/mapping.js
index 9f5a321ec201..6da1acaa344b 100644
--- a/packages/core-js-compat/src/mapping.js
+++ b/packages/core-js-compat/src/mapping.js
@@ -39,6 +39,21 @@ module.exports = {
     [67, '9.2'],
     [71, '10.2'],
   ],
+  ChromeToOperaMobile: [
+    [59, 43],
+    [60, 44],
+    [61, 45],
+    [63, 46],
+    [66, 47],
+    [69, 48],
+    [70, 49],
+    [71, 50],
+    [72, 51],
+    [73, 52],
+    [74, 53],
+    [76, 54],
+    [77, 55],
+  ],
   ChromeToAndroid: [
     [30, '4.4'],
     [33, '4.4.3'],