diff --git a/common/changes/office-ui-fabric-react/hotfix-unintended-changes-in-dropdown_2018-04-19-22-49.json b/common/changes/office-ui-fabric-react/hotfix-unintended-changes-in-dropdown_2018-04-19-22-49.json
new file mode 100644
index 00000000000000..fe501e1ec12e66
--- /dev/null
+++ b/common/changes/office-ui-fabric-react/hotfix-unintended-changes-in-dropdown_2018-04-19-22-49.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "packageName": "office-ui-fabric-react",
+      "comment": "Revert unintended changes to Dropdown styles from #4512",
+      "type": "patch"
+    }
+  ],
+  "packageName": "office-ui-fabric-react",
+  "email": "v-jojanz@microsoft.com"
+}
\ No newline at end of file
diff --git a/packages/office-ui-fabric-react/src/components/Dropdown/Dropdown.scss b/packages/office-ui-fabric-react/src/components/Dropdown/Dropdown.scss
index 71cebc5b8ca5ea..66cba6b8feecd4 100644
--- a/packages/office-ui-fabric-react/src/components/Dropdown/Dropdown.scss
+++ b/packages/office-ui-fabric-react/src/components/Dropdown/Dropdown.scss
@@ -34,7 +34,6 @@ $DropDown-item-height: 32px;
   @include ms-font-m;
   color: $ms-color-neutralPrimary;
 
-  height: $DropDown-height;
   position: relative;
   outline: 0;
   user-select: none;
@@ -150,7 +149,7 @@ $DropDown-item-height: 32px;
   border: 1px solid $ms-color-neutralTertiary;
   cursor: pointer;
   display: block;
-  height: 100%;
+  height: $DropDown-height;
   line-height: $DropDown-height - 2px; // height minus the border
   @include padding(0, $DropDown-height, 0, 12px);
   position: relative;