diff --git a/mozilla/modules/plugin/base/src/nsPluginHostImpl.cpp b/mozilla/modules/plugin/base/src/nsPluginHostImpl.cpp
index 928281b35af..3a0b7eeb6ce 100644
--- a/mozilla/modules/plugin/base/src/nsPluginHostImpl.cpp
+++ b/mozilla/modules/plugin/base/src/nsPluginHostImpl.cpp
@@ -6642,7 +6642,7 @@ nsPluginStreamInfo::UseExistingPluginCacheFile(nsPluginStreamInfo* psi)
 }
 
 void
-nsPluginStreamInfo::SetStreamComplete(PRBool complete)
+nsPluginStreamInfo::SetStreamComplete(const PRBool complete)
 {
   mStreamComplete = complete;
 }