diff --git a/Makefile.am b/Makefile.am
index 5e26a37..104f4c7 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,3 +1,3 @@
 bin_PROGRAMS = glorytun
-glorytun_SOURCES = glorytun.c option.c common.h common-static.h
+glorytun_SOURCES = glorytun.c option.c option.h common.h common-static.h
 glorytun_LDADD = $(libsodium_LIBS)