diff --git a/lib/compressor/restructure/restructBlock.js b/lib/compressor/restructure/restructBlock.js
index e09249e3..8fb1dd77 100644
--- a/lib/compressor/restructure/restructBlock.js
+++ b/lib/compressor/restructure/restructBlock.js
@@ -5,6 +5,10 @@ var dontRestructure = {
     'src': 1 // https://github.com/afelix/csso/issues/50
 };
 
+// https://developer.mozilla.org/en-US/docs/Web/CSS/display#Browser_compatibility
+var IS_DISPLAY = /display$/;
+var DISPLAY_DONT_MIX_VALUE = /table|ruby|flex|-(flex)?box$|grid|contents|run-in/;
+
 var NEEDLESS_TABLE = {
     'border-width': ['border'],
     'border-style': ['border'],
@@ -108,7 +112,7 @@ function getPropertyFingerprint(property, value, declaration, freeze) {
     var vendorId = '';
     var hack9 = 0;
     var functions = {};
-    var units = {};
+    var special = {};
 
     for (var i = 0; i < value.length; i++) {
         if (!vendorId) {
@@ -117,9 +121,16 @@ function getPropertyFingerprint(property, value, declaration, freeze) {
 
         switch (value[i].type) {
             case 'Identifier':
-                if (value[i].name === '\\9') {
+                var name = value[i].name;
+
+                if (name === '\\9') {
                     hack9 = 1;
                 }
+
+                if (IS_DISPLAY.test(property) && DISPLAY_DONT_MIX_VALUE.test(name)) {
+                    special[name] = true;
+                }
+
                 break;
 
             case 'Function':
@@ -140,6 +151,7 @@ function getPropertyFingerprint(property, value, declaration, freeze) {
 
             case 'Dimension':
                 var unit = value[i].unit;
+
                 switch (unit) {
                     // is not supported until IE11
                     case 'rem':
@@ -151,7 +163,7 @@ function getPropertyFingerprint(property, value, declaration, freeze) {
                     case 'vmin':
                     case 'vmax':
                     case 'vm': // IE9 supporting "vm" instead of "vmin".
-                        units[unit] = true;
+                        special[unit] = true;
                         break;
                 }
                 break;
@@ -161,7 +173,7 @@ function getPropertyFingerprint(property, value, declaration, freeze) {
     return (
         fp + property +
         '[' + Object.keys(functions) + ']' +
-        Object.keys(units) +
+        Object.keys(special) +
         hack9 + vendorId
     );
 }
diff --git a/test/fixture/compress/display.css b/test/fixture/compress/display.css
new file mode 100644
index 00000000..7889d536
--- /dev/null
+++ b/test/fixture/compress/display.css
@@ -0,0 +1,16 @@
+/*
+  issue #259 don't override values with different browser support
+*/
+
+.test {
+    display: inline-block;
+    display: -webkit-box;
+    display: -moz-box;
+    display: -webkit-flex;
+    display: -moz-flex;
+    display: -ms-flexbox;
+    display: inline-block;
+    display: table-cell;
+    display: grid;
+    display: flex;
+}
diff --git a/test/fixture/compress/display.min.css b/test/fixture/compress/display.min.css
new file mode 100644
index 00000000..ee734aa4
--- /dev/null
+++ b/test/fixture/compress/display.min.css
@@ -0,0 +1 @@
+.test{display:-webkit-box;display:-moz-box;display:-webkit-flex;display:-moz-flex;display:-ms-flexbox;display:inline-block;display:table-cell;display:grid;display:flex}