diff --git a/Makefile.am b/Makefile.am
index b00767cf..21f776b6 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -294,6 +294,7 @@ endif
 if MBIMMODEM
 mbim_sources =	drivers/mbimmodem/mbim.h \
 		drivers/mbimmodem/mbim.c \
+		drivers/mbimmodem/mbim-private.h \
 		drivers/mbimmodem/mbim-desc.h \
 		drivers/mbimmodem/mbim-desc.c \
 		drivers/mbimmodem/mbim-message.h \