must itemize m4 headers individually or distcheck fails
diff --git a/Makefile.am b/Makefile.am
index 89a8a7f..ff03311 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -21,7 +21,12 @@ EXTRA_DIST = \
autogen.sh \
configure.ac \
ftgl.pc.in \
- m4 \
+ m4/cxx.m4 \
+ m4/font.m4 \
+ m4/freetype2.m4 \
+ m4/gl.m4 \
+ m4/glut.m4 \
+ m4/pkg.m4 \
$(NULL)
# Print out an informative summary.