diff --git a/Makefile.in b/Makefile.in
index d942f1d..1db0ca0 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -332,6 +332,7 @@ install-sdk:
 	@$(MKDIR) $(DESTDIR)$(includedir)/pw3270
 	@$(INSTALL_DATA) src/include/pw3270/v3270.h $(DESTDIR)/$(includedir)/pw3270
 	@$(INSTALL_DATA) src/include/pw3270/trace.h $(DESTDIR)/$(includedir)/pw3270
+	@$(INSTALL_DATA) src/include/pw3270/plugin.h $(DESTDIR)/$(includedir)/pw3270
 	@$(INSTALL_DATA) src/include/pw3270.h $(DESTDIR)/$(includedir)
 
 	@$(MKDIR) $(DESTDIR)/$(libdir)/pkgconfig
--
libgit2 0.21.2