diff --git a/lib/solargraph/complex_type/unique_type.rb b/lib/solargraph/complex_type/unique_type.rb
index 4bbdda5b2..d5f67ae9f 100644
--- a/lib/solargraph/complex_type/unique_type.rb
+++ b/lib/solargraph/complex_type/unique_type.rb
@@ -302,7 +302,6 @@ def desc
         rooted_tags
       end
 
-      # @sg-ignore Need better if/elseanalysis
       # @return [String]
       def to_rbs
         if duck_type?
@@ -311,8 +310,9 @@ def to_rbs
           'bool'
         elsif name.downcase == 'nil'
           'nil'
-        elsif name == GENERIC_TAG_NAME
-          all_params.first&.name
+        elsif name == GENERIC_TAG_NAME && !all_params.empty?
+          # @sg-ignore flow sensitive typing should be able to handle !empty? narrowing first to non-nil
+          all_params.first.name
         elsif %w[Class Module].include?(name)
           rbs_name
         elsif %w[Tuple Array].include?(name) && fixed_parameters?