diff --git a/Makefile.am b/Makefile.am
index f6c16f9a9..9b6ff5284 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -78,3 +78,8 @@ pkgadd:
 # resulting .tar.bz2 file will end up at packages/Win32/cygwin
 cygwinbin:
 	$(MAKE) -C packages/Win32/cygwin cygwinbin
+
+# We extend the standard install with a custom hook:
+install-data-hook:
+	cd include && $(MAKE) install
+	cd docs && $(MAKE) install