diff --git a/lib/roken/roken.h b/lib/roken/roken.h
index d308a52ac..98bc70157 100644
--- a/lib/roken/roken.h
+++ b/lib/roken/roken.h
@@ -295,4 +295,8 @@ extern int optind;
 extern int opterr;
 #endif
 
+#ifdef NEED___PROGNAME_DECLARATION
+extern const char *__progname;
+#endif
+
 #endif /*  __ROKEN_H__ */
diff --git a/lib/roken/roken.h.in b/lib/roken/roken.h.in
index d308a52ac..98bc70157 100644
--- a/lib/roken/roken.h.in
+++ b/lib/roken/roken.h.in
@@ -295,4 +295,8 @@ extern int optind;
 extern int opterr;
 #endif
 
+#ifdef NEED___PROGNAME_DECLARATION
+extern const char *__progname;
+#endif
+
 #endif /*  __ROKEN_H__ */