diff --git a/configure b/configure
index 2ceb2ab67634..b1fe970c7547 100755
--- a/configure
+++ b/configure
@@ -12806,7 +12806,7 @@ EOF
   MOZ_XTF=
   MOZ_XUL_APP=1
   NECKO_DISK_CACHE=
-  NECKO_PROTOCOLS_DEFAULT=="about data http file res"
+  NECKO_PROTOCOLS_DEFAULT="about data http file res"
   NECKO_SMALL_BUFFERS=1
   NS_DISABLE_LOGGING=1
   NS_PRINTING=