diff --git a/qse/lib/cmn/Makefile.am b/qse/lib/cmn/Makefile.am
index 4a83af6f..ea8b8c3b 100644
--- a/qse/lib/cmn/Makefile.am
+++ b/qse/lib/cmn/Makefile.am
@@ -11,6 +11,7 @@ noinst_HEADERS = \
 	cp950.h \
 	fs.h \
 	mem.h \
+	str-subst.h \
 	syscall.h \
 	syserr.h \
 	tre.h \
diff --git a/qse/lib/cmn/Makefile.in b/qse/lib/cmn/Makefile.in
index 8e296f06..42ea1503 100644
--- a/qse/lib/cmn/Makefile.in
+++ b/qse/lib/cmn/Makefile.in
@@ -367,6 +367,7 @@ noinst_HEADERS = \
 	cp950.h \
 	fs.h \
 	mem.h \
+	str-subst.h \
 	syscall.h \
 	syserr.h \
 	tre.h \