diff --git a/src/css/Properties.js b/src/css/Properties.js
index ea69a87f..6e3ecf21 100644
--- a/src/css/Properties.js
+++ b/src/css/Properties.js
@@ -163,7 +163,7 @@ var Properties = {
             valid = ValidationTypes.isAny(expression, numeric);
             if (!valid) {
             
-                if (expression.peek() == "/" && count > 1 && !slash) {
+                if (expression.peek() == "/" && count > 0 && !slash) {
                     slash = true;
                     max = count + 5;
                     expression.next();
diff --git a/tests/css/Validation.js b/tests/css/Validation.js
index 8774bd28..680ea220 100644
--- a/tests/css/Validation.js
+++ b/tests/css/Validation.js
@@ -316,6 +316,7 @@
             "5px",
             "25%",
             "5px 25%",
+            "5px / 25%",
             "5px 25% / 7px 27%",
             "1px 2px 3px 4px / 5px 6px 7px 8px"
         ],