diff --git a/mozilla/netwerk/base/src/nsAuthURLParser.cpp b/mozilla/netwerk/base/src/nsAuthURLParser.cpp
index 4d04e5062d3..4a32cdfd080 100644
--- a/mozilla/netwerk/base/src/nsAuthURLParser.cpp
+++ b/mozilla/netwerk/base/src/nsAuthURLParser.cpp
@@ -420,6 +420,7 @@ nsAuthURLParser::ParseAtDirectory(const char* i_Path, char* *o_Directory,
             int pieceLen = len - (brk + 1 - options);
             ExtractString(brk+1, o_Query, pieceLen);
             len -= pieceLen + 1;
+            *brk = '\0';
         }
 
         // Now look for ';'
diff --git a/mozilla/netwerk/base/src/nsNoAuthURLParser.cpp b/mozilla/netwerk/base/src/nsNoAuthURLParser.cpp
index e4e622027ff..30246c9d136 100644
--- a/mozilla/netwerk/base/src/nsNoAuthURLParser.cpp
+++ b/mozilla/netwerk/base/src/nsNoAuthURLParser.cpp
@@ -254,6 +254,7 @@ nsNoAuthURLParser::ParseAtDirectory(const char* i_Path, char* *o_Directory,
             int pieceLen = len - (brk + 1 - options);
             ExtractString(brk+1, o_Query, pieceLen);
             len -= pieceLen + 1;
+            *brk = '\0';
         }
 
         // Now look for ';'
diff --git a/mozilla/netwerk/base/src/nsStdURLParser.cpp b/mozilla/netwerk/base/src/nsStdURLParser.cpp
index 1f5e8658be2..9bac47fd565 100644
--- a/mozilla/netwerk/base/src/nsStdURLParser.cpp
+++ b/mozilla/netwerk/base/src/nsStdURLParser.cpp
@@ -446,6 +446,7 @@ nsStdURLParser::ParseAtDirectory(const char* i_Path, char* *o_Directory,
             int pieceLen = len - (brk + 1 - options);
             ExtractString(brk+1, o_Query, pieceLen);
             len -= pieceLen + 1;
+            *brk = '\0';
         }
 
         // Now look for ';'