diff --git a/src/options/sort-order.js b/src/options/sort-order.js
index 91b9c679..141734b6 100644
--- a/src/options/sort-order.js
+++ b/src/options/sort-order.js
@@ -385,6 +385,14 @@ module.exports = {
     a = a.node.first().first().content;
     b = b.node.first().first().content;
 
+    if (Array.isArray(a)) {
+      a = a[0].content;
+    }
+
+    if (Array.isArray(b)) {
+      b = b[0].content;
+    }
+
     // Get prefix and unprefixed part. For example:
     // ['-o-animation', '-o-', 'animation']
     // ['color', '', 'color']
diff --git a/test/options/sort-order-fallback/process/scss/leftovers-variable.expected.scss b/test/options/sort-order-fallback/process/scss/leftovers-variable.expected.scss
new file mode 100644
index 00000000..a7d2eca2
--- /dev/null
+++ b/test/options/sort-order-fallback/process/scss/leftovers-variable.expected.scss
@@ -0,0 +1 @@
+div {$blue: steelblue; $red: tomato;  }
diff --git a/test/options/sort-order-fallback/process/scss/leftovers-variable.scss b/test/options/sort-order-fallback/process/scss/leftovers-variable.scss
new file mode 100644
index 00000000..efe7eb6c
--- /dev/null
+++ b/test/options/sort-order-fallback/process/scss/leftovers-variable.scss
@@ -0,0 +1 @@
+div {$red: tomato;  $blue: steelblue; }
diff --git a/test/options/sort-order-fallback/process/test.js b/test/options/sort-order-fallback/process/test.js
index 9127d943..6ef495e0 100644
--- a/test/options/sort-order-fallback/process/test.js
+++ b/test/options/sort-order-fallback/process/test.js
@@ -41,4 +41,15 @@ describe('Option `sort-order-fallback`, process', function() {
       return test.shouldBeEqual('test.css', 'test-3.expected.css');
     });
   });
+
+  describe('scss', function() {
+    it('Should sort leftover variables alphabetically', function() {
+      let config = {
+        'sort-order': [],
+        'sort-order-fallback': 'abc'
+      };
+      let test = new Test(this, config);
+      return test.shouldBeEqual('leftovers-variable.scss', 'leftovers-variable.expected.scss');
+    });
+  });
 });
diff --git a/test/options/sort-order/process/scss/variable.expected.scss b/test/options/sort-order/process/scss/variable.expected.scss
index c17c6341..a7359b10 100644
--- a/test/options/sort-order/process/scss/variable.expected.scss
+++ b/test/options/sort-order/process/scss/variable.expected.scss
@@ -1 +1 @@
-div {$red: tomato;  color: $tomato; }
+div {$red: tomato;  color: $red; }
diff --git a/test/options/sort-order/process/scss/variable.scss b/test/options/sort-order/process/scss/variable.scss
index f759f22c..967fd4f0 100644
--- a/test/options/sort-order/process/scss/variable.scss
+++ b/test/options/sort-order/process/scss/variable.scss
@@ -1 +1 @@
-div { color: $tomato; $red: tomato; }
+div { color: $red; $red: tomato; }