diff --git a/Docs/BUILDING-Framebuffer b/Docs/BUILDING-Framebuffer
index 210bc29d8..8e695c4a9 100644
--- a/Docs/BUILDING-Framebuffer
+++ b/Docs/BUILDING-Framebuffer
@@ -111,6 +111,7 @@
   The NetSurf project has developed several libraries which are required by
   the browser. These are:
 
+  BuildSystem     --  Shared build system, needed to build the other libraries
   LibParserUtils  --  Parser building utility functions
   LibWapcaplet    --  String internment
   Hubbub          --  HTML5 compliant HTML parser
diff --git a/Docs/BUILDING-GTK b/Docs/BUILDING-GTK
index 531f576e6..dab2bef07 100644
--- a/Docs/BUILDING-GTK
+++ b/Docs/BUILDING-GTK
@@ -124,6 +124,7 @@
   The NetSurf project has developed several libraries which are required by
   the browser. These are:
 
+  BuildSystem     --  Shared build system, needed to build the other libraries
   LibParserUtils  --  Parser building utility functions
   LibWapcaplet    --  String internment
   Hubbub          --  HTML5 compliant HTML parser