diff --git a/application/views/user/add.php b/application/views/user/add.php
index 3dfd4ec3..3284b586 100644
--- a/application/views/user/add.php
+++ b/application/views/user/add.php
@@ -85,6 +85,7 @@
         <div class="form-group">
             <label for="user_measurement_base">Measurement preference</label>
             <select class="custom-select" id="user_measurement_base" name="user_measurement_base" required>
+                <option value=''></option>
                 <option value='K' <?php if($measurement_base == "K") { echo "selected=\"selected\""; } ?>>Kilometers</option>
                 <option value='M' <?php if($measurement_base == "M") { echo "selected=\"selected\""; } ?>>Miles</option>
                 <option value='N' <?php if($measurement_base == "N") { echo "selected=\"selected\""; } ?>>Nautical miles</option>
diff --git a/application/views/user/edit.php b/application/views/user/edit.php
index 453950ef..2deb1d30 100644
--- a/application/views/user/edit.php
+++ b/application/views/user/edit.php
@@ -147,7 +147,8 @@
 					<div class="form-group">
 		                <label for="user_measurement_base">Measurement preference</label>
 		                <select class="custom-select" id="user_measurement_base" name="user_measurement_base" aria-describedby="user_measurement_base_Help" required>
-		                    <option value='K' <?php if($user_measurement_base == "K") { echo "selected=\"selected\""; } ?>>Kilometers</option>
+		                    <option value ''></option>
+                            <option value='K' <?php if($user_measurement_base == "K") { echo "selected=\"selected\""; } ?>>Kilometers</option>
 		                    <option value='M' <?php if($user_measurement_base == "M") { echo "selected=\"selected\""; } ?>>Miles</option>
 		                    <option value='N' <?php if($user_measurement_base == "N") { echo "selected=\"selected\""; } ?>>Nautical miles</option>
 		                </select>