diff --git a/libwmc/src/Makefile.am b/libwmc/src/Makefile.am
index 9d264e30..46205016 100644
--- a/libwmc/src/Makefile.am
+++ b/libwmc/src/Makefile.am
@@ -5,6 +5,8 @@ libwmc_la_CPPFLAGS = \
 	$(MM_CFLAGS)
 
 libwmc_la_SOURCES = \
+	protocol.h \
+	result-private.h \
 	errors.c \
 	errors.h \
 	utils.c \