diff --git a/Makefile.am b/Makefile.am
index 57f589d5..e6bc7be1 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -6,7 +6,7 @@ AM_LDFLAGS = $(BOOST_LDFLAGS) $(BOOST_FILESYSTEM_LIB) $(BOOST_SYSTEM_LIB) $(COM
SUBDIRS = test
-UTIL_INCLUDE = \
+UTIL_INCLUDE = \
annotations.hpp \
backtrace.hpp \
bitwise.hpp \
@@ -17,6 +17,7 @@ UTIL_INCLUDE = \
except.hpp \
fixed.hpp \
float.hpp \
+ fwd.hpp \
guid.hpp \
io.hpp \
ip.hpp \
diff --git a/fwd.hpp b/fwd.hpp
new file mode 100644
index 00000000..ed684f39
--- /dev/null
+++ b/fwd.hpp
@@ -0,0 +1,27 @@
+/*
+ * This file is part of libgim.
+ *
+ * libgim is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later
+ * version.
+ *
+ * libgim is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with libgim. If not, see .
+ *
+ * Copyright 2010 Danny Robson
+ */
+
+#ifndef __UTIL_FWD_HPP
+#define __UTIL_FWD_HPP
+
+#define DEFINE_STRUCT(x) struct x;
+#define DEFINE_CLASS(x) class x;
+
+#endif
+