diff --git a/lib/redmine/wiki_formatting/textile/redcloth3.rb b/lib/redmine/wiki_formatting/textile/redcloth3.rb
index 291a0e2d4..2349a0b84 100644
--- a/lib/redmine/wiki_formatting/textile/redcloth3.rb
+++ b/lib/redmine/wiki_formatting/textile/redcloth3.rb
@@ -343,7 +343,7 @@ class RedCloth3 < String
     A_VLGN = /[\-^~]/
     C_CLAS = '(?:\([^")]+\))'
     C_LNGE = '(?:\[[a-z\-_]+\])'
-    C_STYL = '(?:\{[^"}]+\})'
+    C_STYL = '(?:\{[^{][^"}]+\})'
     S_CSPN = '(?:\\\\\d+)'
     S_RSPN = '(?:/\d+)'
     A = "(?:#{A_HLGN}?#{A_VLGN}?|#{A_VLGN}?#{A_HLGN}?)"
diff --git a/test/unit/lib/redmine/wiki_formatting/macros_test.rb b/test/unit/lib/redmine/wiki_formatting/macros_test.rb
index 70e30ef88..7b0dfa6da 100644
--- a/test/unit/lib/redmine/wiki_formatting/macros_test.rb
+++ b/test/unit/lib/redmine/wiki_formatting/macros_test.rb
@@ -401,4 +401,9 @@ EXPECTED
 
     assert_equal expected.gsub(%r{[\r\n\t]}, ''), textilizable(text).gsub(%r{[\r\n\t]}, '')
   end
+
+  def test_macro_should_support_phrase_modifiers
+    text = "*{{hello_world}}*"
+    assert_match %r|\A<p><strong>Hello world!.*</strong></p>\z|, textilizable(text)
+  end
 end