diff --git a/indra/newview/llfloater360capture.cpp b/indra/newview/llfloater360capture.cpp
index 745f1545351282994039340df35c18c66ecfb71d..17febf6c82ea4500a68c714d26fe0e11d918be39 100644
--- a/indra/newview/llfloater360capture.cpp
+++ b/indra/newview/llfloater360capture.cpp
@@ -888,7 +888,10 @@ const std::string LLFloater360Capture::generate_proposed_filename()
         // this looks complex but it's straightforward - removes all non-alpha chars from a string
         // which in this case is the SL region name - we use it as a proposed filename but the user is free to change
         std::string region_name = region->getName();
-        std::replace_if(region_name.begin(), region_name.end(), std::not1(std::ptr_fun(isalnum)), '_');
+// [SL:KB] - Patch: Viewer-Build | Checked: Catznip-6.6
+        std::replace_if(region_name.begin(), region_name.end(), [](unsigned char ch) { return !isalnum(ch); }, '_');
+// [/SL:KB]
+//        std::replace_if(region_name.begin(), region_name.end(), std::not1(std::ptr_fun(isalnum)), '_');
         if (region_name.length() > 0)
         {
             filename << region_name;