Index: tests/gpgscm/ffi.c
===================================================================
--- tests/gpgscm/ffi.c
+++ tests/gpgscm/ffi.c
@@ -36,6 +36,7 @@
 #include <unistd.h>

 #if HAVE_LIBREADLINE
+#define GNUPG_LIBREADLINE_H_INCLUDED
 #include <readline/readline.h>
 #include <readline/history.h>
 #endif