1 files changed, 4 insertions, 0 deletions

diff --git a/apps/plugins/lua/rocklibc.h b/apps/plugins/lua/rocklibc.h
index 78b83a6c18..9b68f429d2 100644
--- a/apps/plugins/lua/rocklibc.h
+++ b/apps/plugins/lua/rocklibc.h
@@ -28,10 +28,12 @@
 
 #ifdef SIMULATOR
 #include <errno.h>
+#define PREFIX(_x_) sim_ ## _x_
 #else
 extern int errno;
 #define EINVAL          22      /* Invalid argument */
 #define ERANGE          34      /* Math result not representable */
+#define PREFIX
 #endif
 
 #define __likely   LIKELY
@@ -41,5 +43,7 @@ extern int errno;
 #define memcmp rb->memcmp
 #define strlen rb->strlen
 
+extern int PREFIX(fscanf)(int fd, const char *fmt, ...);
+
 #endif /* _ROCKLIBC_H_ */