diff --git a/src/nhttpd/yhttpd_core/Makefile.am b/src/nhttpd/yhttpd_core/Makefile.am
index cc760e315..de0679d2b 100644
--- a/src/nhttpd/yhttpd_core/Makefile.am
+++ b/src/nhttpd/yhttpd_core/Makefile.am
@@ -1,5 +1,6 @@
 INCLUDES = \
 	-I$(srcdir) \
+	-I$(top_builddir) \
 	-I$(top_srcdir) \
 	-I$(top_srcdir)/lib \
 	-I$(top_srcdir)/src/zapit/include \