$OpenBSD$

index 1c5f8a6..473d45c 100644
--- netwerk/base/src/nsStandardURL.cpp.orig	Fri Feb 20 15:40:37 2015
+++ netwerk/base/src/nsStandardURL.cpp	Fri Feb 20 15:40:37 2015
@@ -1543,8 +1543,13 @@ nsStandardURL::SetHost(const nsACString &input)
             buf.AppendInt(mPort);
             port_length = buf.Length();
         }
-        mHost.mPos = mAuthority.mPos + mAuthority.mLen - port_length;
-        mHost.mLen = 0;
+        if (mAuthority.mLen > 0) {
+            mHost.mPos = mAuthority.mPos + mAuthority.mLen - port_length;
+            mHost.mLen = 0;
+        } else if (mScheme.mLen > 0) {
+            mHost.mPos = mScheme.mPos + mScheme.mLen + 3;
+            mHost.mLen = 0;
+        }
     }
 
     int32_t shift = ReplaceSegment(mHost.mPos, mHost.mLen, host, len);
@@ -1634,7 +1639,6 @@ nsStandardURL::SetPath(const nsACString &input)
     ENSURE_MUTABLE();
 
     const nsPromiseFlatCString &path = PromiseFlatCString(input);
-
     LOG(("nsStandardURL::SetPath [path=%s]\n", path.get()));
 
     InvalidateCache();