1 files changed, 6 insertions, 0 deletions
diff --git a/lib/feature/definition.rb b/lib/feature/definition.rb
index 270bf46221d..2bad7cfd33d 100644
--- a/lib/feature/definition.rb
+++ b/lib/feature/definition.rb
@@ -7,6 +7,8 @@ module Feature
     attr_reader :path
     attr_reader :attributes
 
+    VALID_FEATURE_NAME = %r{^#{Gitlab::Regex.sep_by_1('_', /[a-z0-9]+/)}$}.freeze
+
     PARAMS.each do |param|
       define_method(param) do
         attributes[param]
@@ -38,6 +40,10 @@ module Feature
         raise Feature::InvalidFeatureFlagError, "Feature flag is missing name"
       end
 
+      unless VALID_FEATURE_NAME =~ name
+        raise Feature::InvalidFeatureFlagError, "Feature flag '#{name}' is invalid"
+      end
+
       unless path.present?
         raise Feature::InvalidFeatureFlagError, "Feature flag '#{name}' is missing path"
       end