diff --git a/include/Makefile.in b/include/Makefile.in
index 0c3e241..afe612c 100644
--- a/include/Makefile.in
+++ b/include/Makefile.in
@@ -27,6 +27,7 @@
 	d3dhal.h \
 	d3dtypes.h \
 	d3dvec.inl \
+	d3dx8core.h \
 	dde.h \
 	ddeml.h \
 	ddraw.h \