diff --git a/src/index.js b/src/index.js
index 33c80a9..d0cf89c 100755
--- a/src/index.js
+++ b/src/index.js
@@ -49,7 +49,9 @@ function sqwish(css, strict) {
     // convert longhand hex to shorthand hex
     .replace(/#([a-fA-F0-9])\1([a-fA-F0-9])\2([a-fA-F0-9])\3(?![a-fA-F0-9])/g, '#$1$2$3')
     // Restore Microsoft longhand hex
-    .replace(/(Microsoft[^;}]*)#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])(?![a-fA-F0-9])/g, '$1#$2$2$3$3$4$4')
+    .replace(/(Microsoft[^;}]*)/g, function(match) {
+      return match.replace(/#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])(?![a-fA-F0-9])/g, '#$1$1$2$2$3$3')
+    })
 
     // replace longhand values with shorthand '5px 5px 5px 5px' => '5px'
     .replace(/\b(\d+[a-z]{2}) \1 \1 \1/gi, '$1')
diff --git a/tests/tests.js b/tests/tests.js
index 1c1e6cb..3a0e25e 100644
--- a/tests/tests.js
+++ b/tests/tests.js
@@ -20,15 +20,15 @@ sink('basic mode', function (test, ok) {
   })
 
   test('IE long hex is kept as long hex', 1, function () {
-    var input = "body { filter: progid:DXImageTransform.Microsoft.gradient(gradientType=0, startColorstr='#FFF2F2F2', endColorstr='#FFFFFFFF'); }"
-      , expected = "body{filter:progid:DXImageTransform.Microsoft.gradient(gradientType=0,startColorstr='#FFF2F2F2',endColorstr='#FFFFFFFF')}"
+    var input = "body { filter: progid:DXImageTransform.Microsoft.gradient(gradientType=0, startColorstr='#FFEEEEEE', endColorstr='#FFFFFFFF'); }"
+      , expected = "body{filter:progid:DXImageTransform.Microsoft.gradient(gradientType=0,startColorstr='#FFEEEEEE',endColorstr='#FFFFFFFF')}"
       , actual = sqwish.minify(input)
     ok(actual == expected, 'IE long hexes are kept that way')
   })
 
   test('IE 6-digit hex is kept as 6-digit hex', 1, function () {
-    var input = "body { filter: progid:DXImageTransform.Microsoft.gradient(gradientType=0, startColorstr='#F2F2F2', endColorstr='#FFFFFF'); }"
-      , expected = "body{filter:progid:DXImageTransform.Microsoft.gradient(gradientType=0,startColorstr='#F2F2F2',endColorstr='#FFFFFF')}"
+    var input = "body { filter: progid:DXImageTransform.Microsoft.gradient(gradientType=0, startColorstr='#EEEEEE', endColorstr='#FFFFFF'); }"
+      , expected = "body{filter:progid:DXImageTransform.Microsoft.gradient(gradientType=0,startColorstr='#EEEEEE',endColorstr='#FFFFFF')}"
       , actual = sqwish.minify(input)
     ok(actual == expected, 'IE 6-digit hexes are kept that way')
   })