diff --git a/src/Makefile.am b/src/Makefile.am
index 7a45185b..b3e0f635 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1,6 +1,6 @@
 bin_PROGRAMS = fwknop
 
-fwknop_SOURCES = fwknop.c
+fwknop_SOURCES = fwknop.c fwknop.h
 
 fwknop_LDADD = $(top_builddir)/fko/libfko.la
 fwknop_CPPFLAGS = -I $(top_srcdir)/fko