diff --git a/camlibs/ptp2/Makefile-files b/camlibs/ptp2/Makefile-files
index 4ab8f584b..24ef392e8 100644
--- a/camlibs/ptp2/Makefile-files
+++ b/camlibs/ptp2/Makefile-files
@@ -32,6 +32,7 @@ ptp2_la_SOURCES      += %reldir%/olympus-wrap.h
 ptp2_la_SOURCES      += %reldir%/chdk.c
 ptp2_la_SOURCES      += %reldir%/fujiptpip.c
 ptp2_la_SOURCES      += %reldir%/ptpip-private.h
+ptp2_la_SOURCES      += %reldir%/array.h
 
 ptp2_la_CFLAGS        = $(camlib_cflags)
 ptp2_la_CPPFLAGS      = $(camlib_cppflags)