diff --git a/lib/process/process.js b/lib/process/process.js
index 0fa2915..db8ed78 100644
--- a/lib/process/process.js
+++ b/lib/process/process.js
@@ -75,6 +75,7 @@ const rcsProcess = (pathString, opts, cb) => {
           replaceKeyframes: options.replaceKeyframes,
           preventRandomName: options.preventRandomName,
           ignoreAttributeSelectors: options.ignoreAttributeSelectors,
+          ignoreCssVariables: options.ignoreCssVariables,
         };
 
         rcs.fillLibraries(bufferData.toString(), availableOptions);
diff --git a/lib/process/processSync.js b/lib/process/processSync.js
index 6938411..4190e6b 100644
--- a/lib/process/processSync.js
+++ b/lib/process/processSync.js
@@ -40,6 +40,7 @@ const processSync = (pathString, opts) => {
         replaceKeyframes: options.replaceKeyframes,
         preventRandomName: options.preventRandomName,
         ignoreAttributeSelectors: options.ignoreAttributeSelectors,
+        ignoreCssVariables: options.ignoreCssVariables,
       };
 
       rcs.fillLibraries(fileData.toString(), availableOptions);
diff --git a/test/files/results/css/css-variables-ignore.css b/test/files/results/css/css-variables-ignore.css
new file mode 100644
index 0000000..14ec43a
--- /dev/null
+++ b/test/files/results/css/css-variables-ignore.css
@@ -0,0 +1,98 @@
+.a {
+    --theme-primary: #111;
+    --theme-secondary: #f0f0f0;
+    --theme-tertiary: #999;
+}
+
+.b {
+    --theme-primary: red;
+    --theme-secondary: white;
+    --theme-tertiary: black;
+}
+
+.c {
+    color: var(--theme-primary);
+    background-color: var(--theme-secondary);
+    font-size: 1.2em;
+    line-height: 1.4;
+    width: 100%;
+    max-width: 400px;
+    padding: 5px;
+    border: 1px solid var(--theme-tertiary);
+    margin: 0 0 20px;
+}
+
+.d {
+    content: 'block';
+}
+
+.e {
+    content: 'block__element';
+}
+
+.f {
+    content: 'block__element--modifier';
+}
+
+.g{
+    content: 'block--modifier';
+}
+
+.h:before {
+    content: 'before';
+}
+
+.f {
+    content: 'block__element--modifier';
+}
+
+#i {
+    content: 'id';
+}
+
+.j[src] {
+    content: 'attribute';
+    filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);
+}
+
+@media screen and (min-width: .40em) {
+    #i {
+        height: .20px;
+        width: .20em;
+    }
+}
+
+/**
+ * a description
+ */
+@media screen and (min-width: 40em)
+
+{
+    #i
+    {
+        height: .20px;
+        width: .20em;
+    }
+}
+
+h1 {
+    color: red;
+}
+
+.k {
+    content: 'reveal';
+    color: #eee;
+    font-size: .5rem;
+}
+
+.l.k {
+    content: 'js reveal';
+}
+
+.m.k {
+    content: 'js reveal';
+}
+
+.n {
+    content: 'js-reveal';
+}
diff --git a/test/processAuto.js b/test/processAuto.js
index 3baa115..613ca79 100644
--- a/test/processAuto.js
+++ b/test/processAuto.js
@@ -15,6 +15,7 @@ test.beforeEach(() => {
   rcsCore.nameGenerator.reset();
   rcsCore.selectorLibrary.reset();
   rcsCore.keyframesLibrary.reset();
+  rcsCore.cssVariablesLibrary.reset();
 });
 
 test.afterEach(() => {
@@ -109,3 +110,34 @@ test.cb('should fail', (t) => {
     t.end();
   });
 });
+
+test.cb('should process auto file with css variables', (t) => {
+  rcs.process.auto('css/css-variables.css', {
+    newPath: testCwd,
+    cwd: fixturesCwd,
+  }, (err) => {
+    const newFile = fs.readFileSync(path.join(testCwd, '/css/css-variables.css'), 'utf8');
+    const expectedFile = fs.readFileSync(path.join(resultsCwd, '/css/css-variables.css'), 'utf8');
+
+    t.falsy(err);
+    t.is(newFile, expectedFile);
+
+    t.end();
+  });
+});
+
+test.cb('should not process auto file with css variables', (t) => {
+  rcs.process.auto('css/css-variables.css', {
+    newPath: testCwd,
+    cwd: fixturesCwd,
+    ignoreCssVariables: true,
+  }, (err) => {
+    const newFile = fs.readFileSync(path.join(testCwd, '/css/css-variables.css'), 'utf8');
+    const expectedFile = fs.readFileSync(path.join(resultsCwd, '/css/css-variables-ignore.css'), 'utf8');
+
+    t.falsy(err);
+    t.is(newFile, expectedFile);
+
+    t.end();
+  });
+});