diff --git a/include/Makefile.in b/include/Makefile.in
index 2d2541d..ce35804 100644
--- a/include/Makefile.in
+++ b/include/Makefile.in
@@ -167,6 +167,7 @@
 	d3dvec.inl \
 	d3dx9.h \
 	d3dx9core.h \
+	d3dx9effect.h \
 	d3dx9math.h \
 	d3dx9math.inl \
 	d3dx9mesh.h \