diff --git a/src/gfx/sdl-1.2/src/rect.c b/src/gfx/sdl-1.2/src/rect.c
index 38d9b62..03c07ae 100644
--- a/src/gfx/sdl-1.2/src/rect.c
+++ b/src/gfx/sdl-1.2/src/rect.c
@@ -2,8 +2,10 @@
 #include <gfx/port.h>
 #include <sdl-1.2/gfx_private.h>
 #include <SDL/SDL.h>
+#include <stdbool.h>
 #include <stddef.h>
 #include <stdlib.h>
+#include <string.h>
 
 void rect_sort(struct rect *const r)
 {
@@ -25,10 +27,13 @@ void rect_sort(struct rect *const r)
     }
 }
 
-void semitrans_rect_init(struct rect *const r)
-{
-}
-
 void rect_init(struct rect *const r)
 {
+    memset(r, 0, sizeof *r);
+}
+
+void semitrans_rect_init(struct rect *const r)
+{
+    rect_init(r);
+    r->stp = true;
 }