diff --git a/Makefile.am b/Makefile.am
index 9ece7a053..58702d06a 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -4774,10 +4774,12 @@ _journal_la_LIBADD = \
 
 id128_la_SOURCES = \
 	src/python-systemd/id128.c \
-	src/python-systemd/id128-constants.h \
 	src/python-systemd/pyutil.c \
 	src/python-systemd/pyutil.h
 
+nodist_id128_la_SOURCES = \
+	src/python-systemd/id128-constants.h
+
 id128_la_CFLAGS = \
 	$(AM_CFLAGS) \
 	-fvisibility=default \