diff --git a/src/nl_types_cygnus.h b/src/nl_types_cygnus.h
new file mode 100644
index 00000000..b467cc43
--- /dev/null
+++ b/src/nl_types_cygnus.h
@@ -0,0 +1,24 @@
+#ifndef _NL_TYPES_EMUL_H
+#define _NL_TYPES_EMUL_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Data types */
+
+typedef int nl_catd;
+
+/* Functions */
+
+char *catgets(nl_catd  cat,  int set_number, int message_number, char *message);
+
+nl_catd catopen(char *name, int flag);
+
+void catclose (nl_catd cat);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _NL_TYPES_EMUL_H */