diff --git a/lib/roken/Makefile.am b/lib/roken/Makefile.am
index fe21caa0b..dd009e082 100644
--- a/lib/roken/Makefile.am
+++ b/lib/roken/Makefile.am
@@ -92,6 +92,7 @@ EXTRA_libroken_la_SOURCES =	\
 	strftime.c		\
 	strlwr.c		\
 	strncasecmp.c		\
+	strndup.c		\
 	strnlen.c		\
 	strsep.c		\
 	strtok_r.c		\
diff --git a/lib/roken/Makefile.in b/lib/roken/Makefile.in
index 530eb4e2b..f0f74152e 100644
--- a/lib/roken/Makefile.in
+++ b/lib/roken/Makefile.in
@@ -94,6 +94,7 @@ SOURCES = \
 	strftime.c \
 	strlwr.c \
 	strncasecmp.c \
+	strndup.c \
 	strnlen.c \
 	strsep.c \
 	strtok_r.c \