diff --git a/stand/common/gfx_fb.h b/stand/common/gfx_fb.h
--- a/stand/common/gfx_fb.h
+++ b/stand/common/gfx_fb.h
@@ -281,6 +281,8 @@
 
 void reset_font_flags(void);
 
+void gfx_interp_md(void);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/stand/common/interp_simple.c b/stand/common/interp_simple.c
--- a/stand/common/interp_simple.c
+++ b/stand/common/interp_simple.c
@@ -198,3 +198,11 @@
 	}
 	return(res);
 }
+
+/*
+ * There's no graphics commands for the simple interpreter.
+ */
+void
+gfx_interp_md(void)
+{
+}
diff --git a/stand/liblua/gfx_utils.c b/stand/liblua/gfx_utils.c
--- a/stand/liblua/gfx_utils.c
+++ b/stand/liblua/gfx_utils.c
@@ -240,3 +240,8 @@
 	luaL_newlib(L, gfxlib);
 	return 1;
 }
+
+void
+gfx_interp_md(void)
+{
+}