diff --git a/generator/cpp2ffi.lua b/generator/cpp2ffi.lua
index f497ddc..f8f30f7 100644
--- a/generator/cpp2ffi.lua
+++ b/generator/cpp2ffi.lua
@@ -620,7 +620,7 @@ local function parseFunction(self,stname,lineorig,namespace,locat)
     defT.defaults = {}
     --for k,def in args:gmatch("([%w%s%*_]+)=([%w_%(%)%s,%*]+)[,%)]") do
     --for k,def in args:gmatch("([%w_]+)=([%w_%(%)%s,%*%.%-]+)[,%)]") do
-    for k,def in args:gmatch('([%w_]+)=([|<%w_%(%)%s,%*%.%-%+%%"]+)[,%)]') do
+    for k,def in args:gmatch('([%w_]+)=([|<%w_%(%)%s,%*%.%-%+%%:"]+)[,%)]') do
         defT.defaults[k]=def
     end
 	defT.templated = self.typenames[stname] and true