diff --git a/basis/glib/ffi/ffi.factor b/basis/glib/ffi/ffi.factor
index 79428a05ff..4ed80c0a7a 100644
--- a/basis/glib/ffi/ffi.factor
+++ b/basis/glib/ffi/ffi.factor
@@ -2,7 +2,7 @@
 ! See http://factorcode.org/license.txt for BSD license.
 USING: accessors alien alien.destructors alien.libraries
 alien.strings alien.syntax combinators io.encodings.utf8 kernel
-gobject-introspection gobject-introspection.standard-types
+gobject.ffi gobject-introspection gobject-introspection.standard-types
 system ;
 IN: glib.ffi
 
@@ -16,7 +16,7 @@ LIBRARY: glib
 } cond
 >>
 
-IMPLEMENT-STRUCTS: GError GPollFD GSource GSourceFuncs ;
+IMPLEMENT-STRUCTS: GPollFD GSource GSourceFuncs ;
 
 CONSTANT: G_MININT8   HEX: -80
 CONSTANT: G_MAXINT8   HEX:  7f
diff --git a/basis/gobject/ffi/ffi.factor b/basis/gobject/ffi/ffi.factor
index 705adedb7e..eac9f34fca 100644
--- a/basis/gobject/ffi/ffi.factor
+++ b/basis/gobject/ffi/ffi.factor
@@ -17,7 +17,7 @@ LIBRARY: gobject
 } cond
 >>
 
-IMPLEMENT-STRUCTS: GValue GParamSpecVariant ;
+IMPLEMENT-STRUCTS: GError GValue GParamSpecVariant ;
 
 GIR: vocab:gobject/GObject-2.0.gir