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-rw-r--r--lib/puppet/parser/functions/merge.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/merge.rb b/lib/puppet/parser/functions/merge.rb
index 6ec085e..54d1c1c 100644
--- a/lib/puppet/parser/functions/merge.rb
+++ b/lib/puppet/parser/functions/merge.rb
@@ -22,6 +22,7 @@ module Puppet::Parser::Functions
accumulator = Hash.new
# Merge into the accumulator hash
args.each do |arg|
+ next if arg.empty? # empty string is synonym for puppet's undef
unless arg.is_a?(Hash)
raise Puppet::ParseError, "merge: unexpected argument type #{arg.class}, only expects hash arguments"
end